I was at the point of facing up to reinstalling FSX and I tried one more test flight. I set the accu-feel sliders to their max noisiness and flew again and whilst idling the engine I thought I could hear something subtle. I went to the FSX sound settings and put all sliders to 50%, which didn't really do much, yet when I selected Q (Sound Off) I found this kills only the MS sounds and now I could more easily hear a hint of other sounds which turned out to be from Accu-Feel. However these were only barely audible and only for tyre squeal and wind rush when diving at VNE. Door opening presented an initial hint of sound then went quiet as did cabin rattling, however braking produced no sound at all.
I went to something heavier and chose the Aerosoft Twotter, this time again with Q sound off, I got a little short squeek for brakes.
Now having heard working effects, it had to be something outside of Accu-feel and started going through the sound card settings, initially not finding much significant, however upon opening up the volume mixer function I found there was a separate slider for FSX, not just devices, but for a program, not seen that before. Anyway that slider was at only 25% of the value that the speaker volume was set to, so i moved it up and Hey Presto! Accu-Feel sounds WORK

, well all except for drag from flaps, but that's probably needing more tweaking from me, overall I think I have resolved it, I'm a much happier bunny now.