Hi. I have a chance to get a Blues Jr III at a decent price. It has a CREX speaker installed which is mainly why I’m interested. I’m not generally a modder (and have no ability in carrying them out). Now I know lots of this is subjective but before I go on a wild goosechase spending extra cash, I don’t want to mod it within an inch of its life for the sake of it, but what are generally regarded as the most effective 2-3 mods to the amp in terms of freeing and balancing the sound a little, and preserving tube life? As I say it has the Rex and I think the general consensus is that the speaker is the first port of call. Thanks all.