Finally got the spacers and new X carriage bits cut (stock is HDPE chopping board from ikea).
Was hard to get a good picture of the spacers, but this should provide a rough idea.
They ended up way too accurate and a little tight so assembly was a pain. Gonna cut new X carriage parts at least, they were worst, maybe I forgot to update the CAM from 1/8" cutter to 3mm cutter after I broke the 1/8" (RIP!).
Anyways, it works beautifully with the V groove wheels on the non-modified non-V profiles. No wobble or wiggle, super smooth, and ridiclouslly easy to adjust the pre loading by turning the nut part of the eccentric spacer. Ended up re-using the cardboard spacers I cut the other day as I didn't have 5x8x1 shims/washers, but even between the springiness of the cardboard and the softness of the HDPE there was a lot less play, virually zero while maintaining a smooth linear motion.
Looking forward to testing with the laser soon!