I am thinking of riggin up a temp sight on my longbow just for bareshaft tuning. Thinking taking a small clamp, putting leather on both sides, clamping it to my riser, and JB welding a small sight pin.

What do ya think? Silly idea?

I take some Handi-Tak , roll it into a a strand and stick it to the riser . This will take care of the up/down adjustment , you still have to sight the arrow for left/right . It works great for me .

how about a toothpick and some scotch tape? ...not the best but definately quick and easy for a bare shaft shooting session....guess where to put it first then move it untill your close enuff that your not going to miss the target, then just put the pin in the same spot on the target every time and shoot your groups. thats how ive done it anyway with a recurve, might be trickier with a longbow since their isnt really much of a sight window and most guys will cant their longbows more than a recurve witha center/past center cut shelf.....

Here's what to do...Go to Wally World or some craft storeand get some round self stick cork pads, like you'd put on the bottom of a lamp or bookends or such. Sometimes you can find it in strips or a sheet that you can cut to any shape you need. Also pick up some of those sewing pins with plastic ball heads. And a can of good paste car wax.

Wax the back of the riser - the wax will make it easier to clean off the stickum from the cork. Stick one of those cork dots or stripson the riser in about the right spot, then another one or two over that in order to build up the thickness some. Then take one of those sewing pins stick it in the dot. Obviously, elevation is adjusted by trying differentspots upand down with the pinuntil you get it right. You adjust windage by pushing the pin in further or pulling it out.

Good idea Arthor thanks.

I guess I don't understand. No offense intended. I don't understand a temporary sight. A bare shaft arrow flies just as straight as a fletched one. (except with broadheads)
At 20 ft. or less one should be grouping just fine. Barring poor release of course. The point would be to observe arrow "lean". Up or down. Or left or right.
If I have offended....please overlook.

bringin it. Its kinda like having a nice open sighted lever gun, that is very handy to use, but if you put a scope on it, its not so handy anymore. But nothing wrong with throwing a scope on it for working up accurate reloads, to find the most accurate, and then taking the scope back off.

I want to separate the outlyers with the real group. I know I can probably hit more precise with a temp site.

Try a piece of auto weather stripping & multi-colored straight pins stuck in it. You can move it up & down.