so how do you use the wall?
im assumeing from your otherr posts that you are not useing the wall to 'condition" your hands, is this correct?
When i use the bag i get into a YCKMY at proper distance to strike the bag with a bent elbow then i whip my fist into the center of the bag. I do this with a relaxed fist, concentrating on differnt things(ie stance, elbow position, relaxed power) i do this to train my structure to accept force/impact, to not tense or loose my stance, and to a lesser degree to get my hands used to the impact force a proper pnch can deliver.
We have had a few that just punch at the bag with all their might as fast as they can, they usually scrape/bruise the hand and get blood on the sand bag. Sifu always says not to bleed on his stuff, but some people never listen i guess :) .
And when you say "full force is an illusion" what do you mean?