I want to print the bennett linkage, known for being an over-constrained structure but mobile. So, for the materials, there's no need in using rigid materials, I think maybe PSA can be useful in this case.  I'll need for each file 2 copies and after that they have to be assembled by their extremity, so, is it better to print like this and make hole after the printing or print with the hole already ? 
For the size, maybe something around 10cm should do.

Thanks!