Printing Parts Question 24.5mm

At the bottoms of the printed parts list it says. (*25mm specific parts have a 25 suffix) Do I need to print these parts even if I am using 24.5 and not 25mm

1* XZ_Side_Belt
1* XZ_Side_Belt_Mirrored
2* XZ
1* Hose Bracket
1* Hose Bracket Mirrored

Yes. You want to print the files that do not have the 25 suffix.

which one of these do I not need?

QTY PART NAME
2 Belt_Stop
2 Belt_Stop_Mirrored
6 cable_tie_insert
4* LR2 X mount
1 X2 plate
1 X2 idler
1 VacShoeBack
1 VacShoeFront
1 VacShoeTop
1 VacDuct
2 Y_Bottom
2 Y_Top
2* Lower Za
2* Lower Zb
2* YZ Roller
2* YZ Roller M
2* XZ Main
4 J_Spacer (F)
1* XZ_Side_Belt
1* XZ_Side_Belt_Mirrored
2* XZ
1* Hose Bracket
1* Hose Bracket Mirrored

You need them all. If you are getting the STL file from thingiverse there are separate pages for the o.d. rail sizes. If you are printing for 25.4 you print everything from that thing page. If you are printing for 25mm o.d. rail size you print everything from that page Including the files that end with “_25mm.DXF” . If printing for 25.4 (1") o.d. you can pretty much ignore anything about the 25 suffix.