I did say I splashed out, anyway the one I sent you was the cheap version (
link: £111+26 postage!!). Apologies I had not noticed they were out of stock, I just dug the link out of my confirmation email.
I have not used the one you have pictures but looking at similar ones it describes it as delivering a flat crimp on each side. Although this should work you really do want a hexagonal crimp for longevity and to ensure a good connection. as mentioned above you can solder them so a combination of that and the cheaper tool may work well and would certainly be better than just a flat crimp.