hey @Frank_fjs maybe the next version can use some of the features on this one i found or maybe to cut cost to buyer since it would be easy to solder on just leave empter spots for solder points https://zenmarket.jp/auction.aspx?itemCode=r299009562
one meter could be for 5v and 12 maybe with a switch to select between and other could be -5 or both 5 and 12v. im not sure what the nobs on the side are.
Could also add a spot for a negatron.
Could make it the deluxe version or something