Grundy
SSDs are getting very affordable these days. You should be able to buy a 120GB SSD for $20 or so. And that will go a long way with Solus!
Why not get one to use with Solus, and set your existing one aside, in case you ever want to go back to the way it was? I have original Windows disks for all of our computers that now run on Solus. Frankly, they're just gathering dust, because I don't think I'll ever want to go back.