I am glad that is settled...again...and until the next time. Lol... Matched loads allow the amp to operate most efficiently in the safest manner. Mismatching by 50% to the low side puts stress on the primary side of the OT...the power tubes. This is the arrangement that Fender allows for with their parallel speaker jacks. Mismatching to 100% over the OT’s design puts the stress on the OT secondary. Greater mismatches in either direction magnify the stresses. And....not all damage to an OT is sudden and total. They can keep on working although they are degraded in their performance. That degradation may or may not be noticed by the user. I had a fellow come around with a DR he thought sounded great. It was not worth listening to when compared to a healthy DR...or any other Fender reverb amp. He had already been told that the output was only 15 watts....and those 15 watts created a sound that was blurred, thin, raggedy. As noted above, there are no ways to visually see the moment when flyback voltage starts piercing the winding insulation and compromising the OT. Mismatching to the high side is what causes extreme flyback voltage spikes that do this damage. Can a mismatch be done ......sure, go ahead....it is not my amp. Any mismatch to the high side that I do will be very temporary and the amp will not be pushed hard. I am not too wild about mismatching to the low side, either. Ommv....and will until the end of it all.