The Corby's should work fine with that blade. You can put them in the big holes, or enlarge the slots. To make the slots larger, the simplest and safest way is to use a diamond or carbide burr in a Dremmel tool. Grind the sides of the slot until they are big enough. Don't try to drill it or bad things will happen.
The Corby bolts can be shortened by grinding/filing both segments down. It may not be necessary unless you are using real thin scales. The sleeve ( female bolt) goes through one scale, through the tang, and sticks into the second scale about half way up the shaft hole. As long as it does not project beyond the counterbore, it will hold tight.
You are pretty astute to figure out that you can flatten the sleeve and make them fit in many cases. This presents no problems as long as the threads are not cut into. I have done this,too. Another way to avoid the problem is to use the mini-Corby bolts. They have a much smaller sleeve. I would suggest that anyone who plans on making a bunch of knives over the years get the Corby bolts in the small size and the regular size, as well as the matching counterbores. That way you can do a lot of things. You can even use them in combination. On that knife you could use two large and three small bolts for a strong handle. It will look neat ,too.
