A short between the speaker posts and the chassis will put the output of the tubes to ground. Be certain that the insulator blocks are installed properly and the heat from the solder did not melt something.
Check for solder splashes too, and be certain the arrangement of output wire from the transformer is identical as when you began.
I know it is too late to say this now, but a Polaroid or digital picture of the stock work is a reassuring tool when you must reassemble. I do this and draw a simple pictorial of what was original and what I plan to do. Sometime even marking the wires with small stickers from the office supply.
Check for solder splashes too, and be certain the arrangement of output wire from the transformer is identical as when you began.
I know it is too late to say this now, but a Polaroid or digital picture of the stock work is a reassuring tool when you must reassemble. I do this and draw a simple pictorial of what was original and what I plan to do. Sometime even marking the wires with small stickers from the office supply.