Wanted, brake tester machine for workshop
Are you asking for a rolling road electronic brake tester- workshop floor mounted ? or a `Tapley meter’ - brake efficiency ’ you place in the vehicle footwell ?
or a Hand-held Brake Decelerometer ?
There are two Tapley`s currently on the “bay” buy-now approx ton +p&p. 
I’m thinking of getting this I don’t know if this is the sort of thing your interested in but I’m not sure where it goes on the lorry
can put it on any flat surface in the cab. footwell or center of the floor if theres room. It needs to be level before use but it will tell you first.
I’ve got a spare G Meter, I’ve been meaning to put on ebay for a while, it’s the basic with no printer option - will need calibrating if you’re going to use for MOT but if just PMIs it’s probably fine as is as was accurate when tested against a calibrated one.
jhmbuttco.com/acatalog/Shop_ … s_473.html
It looks better on inspections to have a printout to staple to the inspection sheet but you can just do a date-stamped photo with your phone and then print out and staple to the inspection sheet.
I actually find the G Meter better to use than then Bowmonk but the Bowmonk does better printouts.