Help me choose my first spindle

[Desertboy]

Hi Boyan,
I've read a lot of your posts and seen some of your builds and so I know I would be wise to listen to your advice.

I try not buy things if possible lol the z axis will be made with this
(Once I have it rebuilt) I have 25mm smooth rod with bearings as well.

which cost me 1 days very hard work stripping it out a machine (I got 3 of them) but no actual money just hard work ;)

I'm using 25mm supported rail on 1 axis because I got it for free and 15mm hi win on the other axis because 1.5m with 4 blocks on 2 rails was £99 delivered.

This is a cheap hack machine lol but I do intend to pimp it up or just build another one I have more t slot and sometimes I get get rails to scrap ;) so we will see.