sure i can understand it needs to be tested hundreds of times, but who is gonna pay for that?? certainly not me. i tested it three times and each time was the same. seems like a pretty reliable test to me. we will be doing some testing on another 4mm motor and also a 10mm. hopefully those results will correspond with these. and as for gettin the plugs out its very simple. you can reach under the pipe and go in thru the front. i do it all the time and have never once been burnt by the pipes.