Created this account to attend this post quickly,
I have been offering lifetime insurance on my knives since i started on knifemaking, especially after i started selling them internationally.
The chances of me honoring your replacements are literally 100%, i always honored every single requests, recently, one customer had a similar problem in an ebony bolster and he got a new whole knife (upgraded in steel), no questions asked.
I sell knives internationally for a couple years and i dont even bother asking the customer if he was at fault or not, but all your knives cracked their handles with materials im very familiar with, that can be due many many factors, handle materials (not synthetic ones) are the worst nightmare of any maker who does shipment overseas. It can be my fault, shipment anormaly (warehouse, flight conditions, climate of your location). My country has a very different climate of your location, which also naturally stresses handle materials.
This being said, i got customers all over the world, some of them owns dozens of knives from me, very few had these problems, mostly recently. I have been actively investigating this problem with customers.
For someone that offers lifetime insurance on all my knives, of course this is of my best interest to discover what may have caused that. Since your knives, i have changed the epoxy system im using and up to date no more reports of splitting handles.
The picture below is of a customer who got half a dozen knives from me about 4 years ago, from Netherlands, which has a VERY different climate from mine. The handles were out of kingwood, a tropical species, but up to date never had a problem, just regular oiling. Handle materials are this chaotic.
You are also my unique customer from New York, this makes a lot harder to find a "common point" to may find out what specifically caused this. I have made several handles using the very same epoxi and technique used in yours, none of the splitted, including handles that shared same materials to yours.
Dont worry of me not honoring these replacements. All my customers are aware that i do lifetime insurance on my knives, this is not a secret, and i will follow doing so.
As of a quality check, this post is somehow dangerous, because i have sold over 200 knives in the last year and very few had problems, which sometimes one little thing can be the problem (one faulty batch of epoxy, one specific mistake of mine during handle making, the list goes on). There are over a hundred of customers who got knives from me and were super happy regarding quality, but i realize that it was a mistake to not ask them to share their good impressions, which in the end of the day may create a bias of only negative reviews.
My original profile on bladeforums have more than 30 positive reviews of my work, and would have more than 50 if would have asked all customers to leave feedback (some people just want to buy, be happy and dont be bothered, which i respect and never pressed anyone like this to be vouching for me)
There are few customers who posted positive feedback on their own, without me asking or anything, i realize now that it was a mistake to not ask people to report when they got positive experiences.
I recently asked Francisco
@Francisco Vaz to make a kitchen knife out of 26c3 with a thin, very slicy blade for delicate cutting chores. It's 63-64 hrc with the edge ground to near zero, the blade is a tad under 5" and sharpened to 2000 grit. Wow, it's a little lazer

exactly what I wanted!
Francisco is great at communicating, he answers questions fast and thoroughly. His prices are reasonable and turn around time is fast. You can deal with him in confidence
The first picture is mine, it's just starting to show a little patina, the other pictures are Francisco's.
Thanks...
Placed an international order with Francisco Vaz. He was great to deal with and contacted me several times to give me shipping updates which was really nice considering it was international. He did an excellent job in packing and the custom made knife he sent was absolutely incredible. I would not hesitate to buy another knife from him. In fact, I am sure I will. Buy with confidence. He is a very talented knife maker.
In this very forum, there are members who owns more than 15 knives from me, and over the course of 2 years got only one small crack on one specific handl with snakewood and an exotic fossil insert.
You could have asked me references for customers who needed replacements, could have provide all of them, not many, in the last 4 years, i did no more than 10 replacements, always handles except one order of a nakiri, where the customer thought the nakiri would be suitable for heavy cleaver use (while nakiri is specific for veggies).
As mentioned, no questions asked, i dont focus on having arguments with customers, if you have problem with a knife of mine, i will be happy to fix it, then, we can discuss what may have caused it, no matter it was your fault or not. That is not of my concern, we all do mistakes.
I will be soon start to actively ask customers to have their positive experiences with me reported as well, it makes me sad that while there are dozens and dozens of knives that make customers happy, the very few bad situations get the spotlight. This being said, your complaint is genuine and it will be fixed.
Sorry for any english mistake, i wrote this fast, not in home.