These are really excellent machine heads, but the use of different ratios puts them apart from anything else. Tuning is rapid, precise and stable. I won't fit anything else now (unless a vintage look is more important than function). Fitting is under 15 mins and very simple.
Note: If you want to fit them on a Fender with a 2-pin fitting, you'll need a plate, part no. PRT-952-201, Thomann can obtain it by special order, about £14. Shame they don't stock them. Other styles of plate are included.