So I buy the Studio 4 MAX upgrade back when I posted the OP.
Today I get an email form IKM telling me that as an owner of Studio 3.5 MAX I'm eligible for a Studio 4 MAX upgrade.
I'm convinced @Peter - IK Multimedia showed them posts of me admitting to double purchasing other VSTs in the past (that I had forgotten I'd already bought) ?
I have one of these arriving Friday. Note the 15w/1w switch to the left of the input.
https://www.monoprice.com/product?p_id=611815&msclkid=7ace75578f3b1550c9fa119d097470c2&utm_source=bing&utm_medium=cpc&utm_campaign=Shopping | All Products | Monoprice&utm_term=4580565447217773&utm_content=All Products
Worst case? I replace the Celestion with a Blue Back.
I did it the same last month with my own $75 voucher.
I wonder if there will be a new item this month that I can use my $75 voucher for. If not at the end of the month, I'll offer up mine in the style of this thread.