de a glass backed 'boo cored longbow and the limbs are identical length. Now, the question is, as I made the tips a different length, only about a 1/4'' difference. The nock to nock measurement is evenly spaced but one tip ie past the string groove is longer than the other to facilitate using a string keeper and the other shorter to allow easier slipping over of the string.Now if I have timed the tips to be a mirror image at full draw, will the slightly higher mass on the longer tip make an appreciable difference to over all tiller and smoothness?

NO, Not unless it is a huge differance in size.
You will be fine.

CTT

Often tips are different with the upper being a bit fancier-gets seen more.

It will make no difference.  I build my longbows with the bottom nock shorter.  It helps keep the bottom tip from hitting the ground in a blind or treestand.

Thanks Gents.

If I'm building a bow for someone NO but if it's for me yes. I can see most on here quinching. But if it's for me I'll make it a little longer and pointer for the reason I only ground hunt, setting. I stick my bow in the ground in front of me. Alot less movement with just your hands clamped to your sides. Iexspecially do it in the cold.