X-Class 300-600a PDB with or without 3a adjustable DC-DC converter/regulator.
!!!!! Important !!!!! you must set the voltage on the regulator to the desired voltage before you use it. Use a tiny screwdriver on the silver pot and an ohm meter to read the voltage. 3s to 6s input. (Has been used on 8s power but it is not rated for it)
Weight is around 15gr pre-tin your wire and solder it in place right on top of the pre-tined solid copper buss bar.
Use one side for positive the other side for negative. use 10ga silicone stranded wire.