reconfiguring maxamps packs

[mt_enthusiast]

does anyone have experience reconfiguring maxamps packs? I must not have good enough soldering irons because I can't get the bars to come loose. I've got a 40watt iron and a 100 watt soldering gun. Neither seem to be doing the trick. They have been fine up to this point, but I have been buying preconfigured packs until now. I'm changing the E-Maxx style to flat pack as well as making a 7cell hump pack into a flat pack. Please help.