its a great idea, simple as that, the best bit of kit that will ever be sold as a wfp backpack, mark my words these will overtake any plastic backpack, give it a year at most, then come back and laugh :
so when i come out with the new selfraising pole, what will folk laugh at then, o its not the same without clamps, i loved getting sore arms and shoulders everyday extending poles to 50ft 
blimey am just trying to make life a little easier for everyone,
Lighten up Jo, do people honestly wear the backpac, I believe most dont, they carry them, or turn them into trolleys, I for one wouldnt personally want to fill a jacket then put it on, or put it on then stand there and fill it, personally id rather fill my round then start dropping the custys where you suggest this item would come in handy, so maybe people just need to get rid of chaf work before investing in such a item, But each to there own and its only my opinion
I'm afraid many guy's on here wear the backpack but maybe because this backpack doesn't displace its full load on your back, then maybe Just a few more people would wear it without the risk of putting your back out, Joe seen the problem addressed the issue and solved it, Maybe you could give the guy credit for that instead of coming on here and taking the P***
I personal think its a good idea for hard access area's, one member was telling us he had to put covers on his trolley wheels to be able to take it through a customers house without causing any damage, with one of these he wouldn't have the problem.
Joe works hard and spends a lot of money on his inventions were all waiting for the hose cleaner to be released and for the benefit of us all, to many suppliers have been driven from this forum for the exact same comments, lets not drive the wfp inventors away while were at it.