Increase base of tree supports or add built-in brim

Hi @julianstirling and @williamwadsworth !

I really like that the microscope stand now has built-in tree supports to deal with the large bridges. However, I've now had it happen on two different 3D printers that the tree supports come loose during printing. I imagine that I can solve this by adding brims manually, but I don't usually use brims on any of my prints. OFM parts print great without brims on all my printers, except in the case of the new tree supports.

Can we maybe increase the base of the tree supports, or add a built-in brim just for the supports?

Cheers, Gerrit