The spindles were easy to line up as the top of the bumper is flat and the swings are square tube in a flat plane so it was easy to tack and clamp all of that. The design is pretty forgiving of a little error there as well but it was easy to nail that part since the main section was firmed up by then and my confidence was up overall.
Of bigger concern for me on the spindles was weld strength and any heat damage to the material or bearing surfaces... but it's held up to lots of rough use and vibration (2015 build for me) and failures seem to be exceedingly rare. I welded it from inside and out, everywhere I could get the MIG gun.
On spindles I've had a few guys say their bearings rusted up so mine are 100% packed to the gills with grease to eliminate any air space where moisture might condense and no problems yet... these don't run at any speed so no risk of overpacking IMHO.
Of bigger concern for me on the spindles was weld strength and any heat damage to the material or bearing surfaces... but it's held up to lots of rough use and vibration (2015 build for me) and failures seem to be exceedingly rare. I welded it from inside and out, everywhere I could get the MIG gun.
On spindles I've had a few guys say their bearings rusted up so mine are 100% packed to the gills with grease to eliminate any air space where moisture might condense and no problems yet... these don't run at any speed so no risk of overpacking IMHO.