Thanks for the feed back guys.
I've noticed quite a bit of difference from one Bear riser to the next one. But mostly it has been alignment issues. That's why i have my customers send me their risers so i can custom fit the limbs and make sure they are straight. I've had some that were pretty loose, and others tighter, but typically i can mill the slot in the limbs at .25" (1/4" ) and have them work fine with a little fine tuning.
I fit the limbs to the riser first with a full width limb profile, then center line them and shape the limb width profile dead straight...... But.... I cannot even get a 1/4" slot to even mount on the Fred Eichler riser. The tendon measures .020 - .024 wider than the std Bear riser. I had to do a lot of sanding to get these limbs to slide into the groove.
If the limbs are too loose and move from side to side a bit in the riser, it moves those limb tips a LOT... This can cause limb alignment issues, poor tracking, and even limb twist if its bad enough. With a conservative limb design, you can get away with a wee bit of slop in the fit. But with these static tip recurve limbs i build. as well as the Hybrid long bow design, they need to be dead straight to get good alignment and tracking.
Here are a few pictures if you are interested...
https://photos.app.goo.gl/fjaQfE5PTT8JntKu9If you cannot open this link to see the photos, please let me know and i can upload them to this thread.
Kirk