Starwind0,
I would take samples of what you want to sew and go see Alexander at Solar Leather in Dallas. Yah, it takes a lot of time and some expense to travel to see him but you will get a chance to see what they have and more importantly, sew on them.. After all, this is not going to be a $20.00 purchase. That will probably answer a lot of your questions. If you are ready to buy, take money with you and bring it back with you to save the shipping.
I drove 800 miles one way to pick up a long arm Adler last summer. It was a 2 day drip and cost me $400.00 in gas, food and lodging. However, I got a long arm Adler 767FA273 double needle stretched to 30"with all the toys for $750.00. That machine was over $12,000.00 new. Yes, it has to be rebuilt but I have it in my shop with the table , and all and the Efka motor is single phase!
For the money you are going to spend, go see and sew on it. You don't buy a car without test driving it!
glenn