Hallo Nico.
Them JJ´s will work just fine.
In turn JJ manufactures 250uF cans as well,and two of those in series will amount to about the same thing as them 200uF ones if you take factory speced deviations into account alone.
I just happen to have revived an old Roost Sessionmaster reverb 100. The 212 combo.
Now..i modded the living crap out of it,but none the less...
The stock "large" ones in mine weren´t 200uF...but 400uF a piece
. Iow...you guessed it. I guess they weren´t all that anal about capacitance even at the factory.
I went JJ all the way.
As is amp works and works very well. In my case with 250uF a pop electrolytes in series for the first hit. Btw. While at it it might be a good idea to relocalize the main ground for them two electrolytes to bridge negative first thing to make the amp adhere to "the golden rule".
Mine...is studio quality silent in idle after handling that.
What´s more...
These combos are DEAD heavy stock! 44kg worth!
So. I opted to build a fresh cab for it out of solid pine and in turn install a pair of Celestions Neo´s. That made weight drop from 44kg to...
...28kg!!
Well worth the effort to say the least.