After a couple years of sitting on a new design idea for a guitar tremolo I finally built a prototype to test the main mechanism. It worked as expected! I had an experienced guitarist check it out, he loved it! Here is my dilemma. I have practically zero money to invest in it so my thinking is I'll skip the patent thing and start making them by hand myself. I made the prototype out of aluminum using JB Weld to join pieces. My thinking was that aluminum would be a poor choice of materials for sound quality but its not bad. It would be sweet if I could make these out of mainly aluminum. I have no clue which way to go as far as welding/brazing, cheaper would be awesome. There is a good deal of force involved with a tremolo, as much as 250lbs of force in some circumstances. The pieces involved in being fastened together would vary in thickness from 3/16 to 1/2. I've seen these nifty looking brazing rods in videos that make it sound like they are better then welding but I don't know. One of the pieces I may be better off casting. Any experts on fastening aluminum here that could help a brother out? Any sort of welder that I could build myself cheap?