I can't say that I ever put a kit together, but I can say that the wood choices are a must. Always go with a wood that is definitely known for its musical qualities, because they will resonate where others will not. I love Cut*N*Run's (vibrational energy) statement....because that is exactly what you should be looking for in a pot call, kits should be basic, so you would more then likely have to do the finishing touches.....like making sure your measurements between the top of the sound board and the bottom of your striking surface is right .... too close or too far makes a dead caller.... floor thickness too much creates less vibration too thin creates echo valley....I know it sounds like a lot, but even in kit form you should do what you can to make a presentable caller for those Toms. Hard woods with straight tight grains make great pots, use materials that will make your pot easy to use, I would recommend using combos that are established call producers. You simply can't go wrong with the basics.