Have been experimenting again
Here's my take on things (based on the successes I have had-notwithstanding all the pleasure that still awaits!)

Normal penile ejaculatory orgasm involves penile stimulation amplified by MODERATE PC contractions.
MODERATE PC contractions also amplfiy any erotic sensations produced by non genital stimulation as in KSMO.
However penile stimulation can also produce non ejaculatory orgasms as long as the PC MUSCLES are VOLUNTARILY controlled-either to relax completely or to CONTRACT EXTREMELY INTENSELY through the PONR.
Uncontrolled moderate pc contractions along with frenulum stimulation is what triggers ejaculation for me.
However this process MUST start with complete relaxation in the arousal phase and a complete LACK OF EXPECTATION ase well as an ACUTE willingness to trust the process and enjoy every pleasurable sensation as it comes.
This is greatly aided by mentally slowing down the heartbeat and breathing.
I shall be happy for any feedback/suggestions and shall be happy to guide anyone still learning
Cheers
A