Don, Harbor Freight has a store over by Nice Twice so I often just stop by on my way to or from the hobby shop just to see what they have I can't live without. I have about 6 of those clamps. I removed the roll pin stop so they open a bunch more then when new. They have a lot of stuff I use. So does the Dollar Store. If you only paid 99 cents for a tool you don't mind it when someone borrows it at the field and forgets to return it. I even buy the three pack of CA there so I have some CA in my flight box.
Knight, what Dread said is true, the 40 is a much easier plane to see and fly plus it is better to remove a bit of that lift out of the wing. Because my eyes are getting a bit fuzzy the bigger planes are just easier to see. I like ailerons in a trainer and have been using the 60 size planes to teach with.