So I already got my triaxis and my 2:90 is on the way (Blue bulb in front).. I bought it used and I think it may need retubing.. Now I have a matched quad of Tad 6l6GCs and a matched quad of sovtek 5881, I know the 5881s are 25 watts (Same like the EL34s I guess) compared to 6l6GC 30 watts.. can...