x Solids not loaded due to errors in the file

[Dr.Satan]

Hammer hates me!

No, here's the situation;

I have a structure that is square, with like 4 pillars at each corner. On top of each corner is a dome that looks like this:

http://www.dctrs8tn.com/images/FF/dome.jpg

so right now the dome is solid, and inside each dome is another solid dome, just smaller in proportion. And everything is hunky dorry. Now when I hollow out the domes (ctrl+h) to 8 units, save, and reload, hammer deletes shit b/c it can't render it properly. Which fucks everything up.

SO is there anyway to get around this in hammer? And if not, is there a simple way that I can take the brushes I have and convert them to models w/out needing a brand new and complex program that I have no idea how to use and / or learning how to model?