IME it seems that Goldtip Factory fletched arrows end up being really poor for straightness run-out. Were these factory fletched?

Buying shafts is a much better way to go about things.

For comparison purposes I recieved a dozen XT 55/75 shafts last week. Of the twelve:

9 were very straight as bare shafts: two of them required an inch or so from the nock end to be cut off to yield a extremely straight shaft (.005 to 006- TIR).

2 were of the same excellent straightness when cutting a bit from both ends to make a completed (28" ) shaft

1 was truly poor in quality, and only someone with a very short arrow (25" or less) would be able to chop off enough from both ends to get a straight useable shaft.

I' ll use that one as a tester for setting up my fletching jig.

All in all better straightness than the last 2 dozen Beman ICSH, dozen Blackhawk A/C' s & a dozen Standard CX I' ve bought.