an iron and a desoldering sucker and a pair of side snips and a hex key and screwdriver I think is all you need. Just make sure the electrolytics(pos down) and diodes are in right way.(should be marked) took about 1/2hr. I put some better feet on mine as well.
if your nervous you could get it done for you tho.
He does better russian valves too but also need soldering