It's reassuring to hear that it's indeed possible to run 207 from the comments above - Ryan at Neel's Saddlery is setting the unit up and is going to demo it to me on 138, he is hesitant to guarantee that 207 will be a trouble-free experience, and feels that it may be pushing the machine 'to its max'. I can see where that might be a fair statement, but to say I'm not experienced enough to even have an intelligent conversation about it at this point would be an understatement - I'm as green as it gets, but hopefully I'm choosing a good machine and distributor. I'm going to drive up to his location tomorrow and lay hands on the machine, run some sample leather through it, and if all goes well, bring it home with me. The one point he has driven home to me so far during our phone calls is that 'there is no single good middle ground machine', and that if I really want to do both lightweight leather with smaller thread gauges and heavy leathers with large thread gauges, that eventually, I'm going to end up with 2 machines.