Hi Jess,
Since I personally do all of the Anniversary mods once the stock units have passed Quality Control, I can say that only a few TORII JR's have been done so far. If it's in the budget or not too far beyond it, I recommend it highly!
Start with the Ultra-linear resistor mod, which relaxes the amp and improves musicality. That mod is already done on all new TORII JR 2019 models.
Secondly the beeswax bypass cap mod... it easily shoves the amplifier into the 5 digit club. For anyone who has owned and loved the TORII JR, the mod is especially rewarding because when you get the amp back it is like a new amp... everything it was before multiplied by 1.5 which is about a 50% improvement in all categories. It would be quite a thrill frankly, and that's what makes this hobby so much fun. The mod will basically reboot your entire music library as each recording will be presented in a way that will change your focus to notice different things, so the mod is like getting a whole new music library for free.
For the investment of the original amp and the mods, being sold to you wholesale, it puts the amp in the un-touchable category with respect to how it will sound compared to other push-pull amps that are well over double the price. You will find it takes more like triple the price or higher to get close and even then it make still take more... if for example, the amp has circuit boards in it, there is a good possibility that it won't sound better regardless of price, meaning even 6 digit amplifiers may not sound better.
There are precious few audio companies in the USA that are hand-building tube amplifies point-to-point. Think of it... for the same price as a mass-produced Chinese iPhone you can get a real American tube amplifier built with American steel and a lifetime warranty! I guess my point in all this rambling is that this is a rare opportunity so if it's in the doable budget, As Anna would say, "Please do it. You'll be glad you did!"
Steve