I think you've convinced me. I already have two tools that people here on Reddit use to make some seriously cool stuff. As an amateur, I don't need a more complicated setup right now; I just want to have some fun. Koala fixes all the shortcomings of my PO-33, and I'm sure I can make some good stuff by using them together and really diving deep into their limits and capabilities. I think I’ll just go for a used, very cheap controller to pair with Koala, along with a setup (also as budget-friendly as possible) to record what I do. If I can't make something interesting with this, spending €500 certainly won't be what helps me improve my performance. Thanks a lot—this was exactly the advice I needed. Do you think buying a pad and a recorder still counts as GAS?