yeh seen it mate, looks good in theory... then i thought.. how do you fill the thing up? maybe remove the nozzle and dip the end in a bucket of mix, draw back the plunger, refit the nozzle... might just work... couldnt imagine spooning muck down the end though...
you get the impression from the video that hes put all that muck on with one tubefull... i doubt it...
i'd be interested to find out if anyones got one/used one...