I have bought some old reQuest panels, bass drivers, and crossovers from a pair of reQuest spekers and plan on building my own MLreQuest variants from the various parts. My plans include replacing the woofers with some Lambda Acoustic 12" subs I have on hand and using a 250 watt plate amp (or larger), bypassing the ML crossover for the woffer section. I wnat to do a ported box about 3.5 cu. ft in size tuned to 25 hz. I need to resolder the panels as the connecting wires have come off the front and back. I have tried to resolder with no luck. I can't get the solder to stick. Anyone have any ideas, flux perhaps??? I am going to have to completely build cabinets and everything, and have a pair of SL3's to use as a guide, but any help or ideas would be greatly appreciated. Thanks very much..