Well, I'm not sure what to say about that except that I've pull tested the crimps that mine makes on standard density d-sub contacts with 22AWG wire and found them to be plenty strong enough. How strong? I didn't put a scale on it, but given that the backshell provides strain relief I'm not at all worried about wires pulling loose from their contacts.
B&C sell the Paladin PA1460 ($49) and SteinAir sell a crimper ($38) identical the one that I use. I'll bet a lot of E-AB aircraft have been successfully wired with them.
I wish I had the budget to buy NASA-spec tooling for every task, but sadly I'm just not that builder. I sure envy the guys who do.