"Kydex for BK 9 and 5
I've been looking into getting some kydex sheaths made up but I had some questions first. Is there any advantage to getting a pancake over a taco sheath or vice versa? To the extra eyelets allow for more carry options? I'll most likely carry these on my belt but one could end up on my bag. Thanks in advance for the hekp guys! ."
I think the differences are pretty much covered. I only use foldover sheaths for small knives myself but they'll definitey work for the larger knives, just personal preference but I also offer alot of "options" with my sheaths.
I'll stick to Becker photos since that's what your interested in...... but the above pics are some serious knife porn

Lot's of "I want!" there.

blah, blah, blah.......... here's the pics
BK9/BK14 Pouch-Sheath combo piggy-backed with accessory pouch and dangler:
Considering the amount of steel in this setup I (and the customer who received it) was really surprised how well it carried, after a minute or two I forgot it was there and my danglers only flex front to back (with your leg movement) there's only a coupld of degrees of outward flex.....though it can be added when molding Kydex to the D-ring. There's also enough relief/drop between the scales and the dangler so that they don't make contact with eachother.
The second "detail knife" pouch-sheath in this combo has it's own sheath even though it's mounted to the larger sheath..... if you decided to you could remove it and use it by itself and leave the larger sheath mounted to a pack too. This shows another advantage to having a "pancake" sheath.... no need to cant rearwards for clearance you can center/secure accessories much better. I could make all of this happen with a "taco" sheath too though.
Here's a close-up of the second sheath in that combo with it's own mounting options:
I really like to make/use them with an ESEE-Firekit which leaves more room inside the tin since you've already got Fire, Tinder, Compass/Navigation covered....all on the outside of the sheath. And with a "pancake" sheath you have twice the mounting options though I like to mount them to the rear/blade portion of the sheath anyways.
ESEE-4 w/ESEE-Firekit:
Very similar to the first sheath pictured but with no "piggy-backed" sheath. Still is a "pouch-sheath" though and on a Falcon II (pictured) you can run one of the compression straps between the pouch and sheath (pictured):
Now for the Mighty BK9! Here's a pic of a BK9 sheath (not pouch-sheath) with an adapter plate for one of my pouch-sheaths BK14:
BK Family Pic:
Here's a customer photo of an ESEE-6 pancake sheath mounted to a TAD pack (just for reference)
This is a picture of a "quick & dirty" sheath I made for a modded BK9 I'm "borrowing"/reviewing for the BK&T guy's. Pack mounted, it now has a second pouch stacked on top of the one pictured, these pouches are longer than standard "tin" pouches and a SOG multitool & ESEE-Firekit fit in the same pouch. I made this at midnight before an outing we had in the Superstition Wilderness so it was a quickie but I'm real happy with the way it came out and I'm picturing you using something like this for your nine/pack-mounted. I can draw and re-sheath a BK9 one handed while wearing the pack....pretty damn handy and my "detail knife" Izula was mounted to my belt....just in case I get seperated from the pack/9.
Hope this helps. You've got alot of pictures from two different sheath makers now so after this I'm sure you'll have a pretty good idea which direction your heading.
Thanks for looking,
Eli