I am a new fan of your ZenXY, and I am on the way to build one.
My main problem is that I am french, and in France (and I think everywhere in Europe, except in UK), it is very difficult to buy iron pipes with a diameter of 23.5 mm. It is only possible to find aluminium pipes in this diameter, but I am afraid it will not be a good idea to use iron bearings on aluminium pipes.
So, my question is: do you consider to adapt your models for pipes of 25 mm? Or, if not, what is the most important to modify and to keep in your model if I want to try to update the files myself?
Thank you very for your work, it is a very pretty machine, I would like to build one.