Being a smart arse and a tight arse, I thought I could use my GCSE in D&T Electronics to make myself a set of these.
Seriously... what it cost me in parts, time, solder, burns and the mrs complaining of the smell of flux in the living room I should have just bought the things from BigPie!
Took sodding ages to figure out a way to wire it neatly and the over an hour to make one, then another 2 hours to redo all the wiring on the bike to suit the new layout.
In the end you get a nice neat bit of kit... but god was it a PITA to make.
Quite robust base with a few mounting options.
How you can sit there with your little production line going is beyond me. 2 was enough for me to do in one lifetime.