I use forstener bits for drilling the clean holes... I got a little carried away on one front big one and caught the edge a little, but didn't hurt anything.

They have .5" stab tubes... so they may not fit... we'll see... depends on how exacting their .5" is... I might try sanding a touch from inside the sleeves if I think I'm in the ball park.

If they work:

they will be 1.2 oz lighter + the tailwehel is .4 oz lighter and I lightened the tail by .7 oz... total of 2.3 oz... that's a WHOLE bunch of weight I won't need in the nose... at least 6-7 oz...

I plan on the DA50...

Here's what forsteners are if you haven't seen them...