ok i got all the stuff for load tester, and today I assemble it, and when i powered it on it goes only to 136W-138W, first i thouht it may be the little variac and directly connected the catridge to power source. it stayed at 138W
One i ordered and payed for is 350W i was pissed so now i contacted the seller to send another one, so antoher month wating.

here are few pics of the build


stay tuned