Soft pedal HZ brakes on LH

i have put HZ brakes on the front of my LH, the pedal is now long and sometimes soft, all corners have been bled countless times.

the question is, would the hz calipers, with a bigger piston than the standard lh calipers be causing pressure drop? the master is original LH for disc and drum and it has HQ drums on the rear aswell

do i need to put a different master on it (commodore or HZ WB)?
or am i doing something wrong??

Cheers in advance!

Torry M/C should be fine. With the HZ front calipers, is the bleeder nipple on the calipers above the point the flexible brake hose connects to the caliper? If not the calipers are on the wrong side and you will NEVER bleed all the air out of them. I've seen that done plenty of times.