hi
master cylinder has just been checked and a1 as for the revs being altered by brake pedal SORTED it turned out to be the rubber seal around the mixture screw it had a split, only noticed as i was cleaning metering head so got new seal and BINGO

with the loading valves at the rear ,i disconnect the push rod with a srew driver by twisting from behind the rubber the i clamp the levers right over so fully open and the first time i tried this about 7months i took 2 bits of clear tubing and attached to calipers and with one push of brake pedal with both nipples open then held down untill all nipples closed and then measured fluid i repeated this many times with the loading lever in different adjustments and got eaqual results to both sides so i think it works well but if anybody else does this method make sure they put a bit of vasaline on the pushrod to aid fitting
going to have another go at bleeding and if no joy abs is coming off
cheers your all gents
mark2