I got an ISO cab and...

[hblu22]

You can get away with some ribbon mics like m160. I have the Grossman box as well and have used an R121 but I have also used an iron man attenuator to bring the volume in the box down to not hit it with too much pressure. Also I kept it at a 45 degree angle.

 

[GuitarJon]

Fwiw: I've started offering IRs packs of all the speakers that I've been getting. Only 6 speakers so far as well as 2 bundles for some discount. The results have been great, way better than I could have hoped for so these IRs are all I use now in the "digital realm". It's so sick to be able to have the sounds from my real cab in the digital world as well. You can see all my current offerings here but I'd like to add more soon:

https://ko-fi.com/sonicdrivestudio/shop