I've made progress primarily because of the assistance of members here @cpaptalk
The experiences shared by each of you regarding mask selection, nasal pillows vs high pressure,
and mask "hacks" has greatly improved my comfort level and my Large Leak rate.
In particular, a few astute observations about contradicting my prescription
and reducing pressure led to cutting my AHI by 50% -
from a three week average of about 17.5AHI to less than 9AHI this past few days.
To continue improving my results - cutting my apneas in half AGAIN -
I'd appreciate your informed opinions of last night's SH report and any changes that I should consider:
Current: IP=18 EP=8 PS=4
Former: IP=24 EP=12 PS=8

MY PROGRESS wi MASK SELECTION:
WISP nasal mask > WISP + Pad-A-Cheek + Chinstrap > WISP + Pad-A-Cheek + mouth taped >
ESON full face mask > F10 full face mask > F10 + Blue Mesh Headgear >
Tap Pap > Tap Pap + mouth taped > Tap Pap + mouth taped + soft cervical collar >>>
TAP PAP wi soft cervical collar (CURRENT)
My best results were actually obtained with the Tap Pap + cervical collar + mouth taped = 7.04 AHI
with an LL rate below 10%.
It is fiddle-y and time-consuming to get the tape fitted around the Tap Pap oral appliance however,
and not particularly comfortable.
So I ditched the mouth tape and am trying just the cervical collar for now
Thanks for taking the time to consider this. Dennis