I think the thread you are looking for is this one:
Here is the opinion of the British Stainless Steel Association. There would seem to be low risk of corrosion of using stainless steel:
Corrosion risks with aluminium and stainless steel in contact
Aluminium and stainless steel together also appears to be a bi-metallic corrosion risk, from the 'nobility' table. With this combination the affect of relative surface area on corrosion is important.
A large area of 'cathode' relative to 'anode' will accelerate the anodic corrosion. Although aluminium is anodic to stainless steel, large relative surface areas of aluminium to stainless steel can be acceptable, dependant on local conditions. Stainless steel fasteners in aluminium plates or sheets are normally considered safe, whereas aluminium rivets or bolts holding stainless steel parts together is an unwise combination, as there is a practical risk of corrosion.
2016 International Signature (Oyster/Ebony), Dual A/C, 28'
2018 GMC Sierra SLE 2500HD, 4x4, Crew Cab, Duramax Diesel, Leer cap, Equalizer hitch
DIY Solar: 500W Renogy panels, AM Solar hardware, Blue Sky MPPT controller and monitor, 470ah (C20) Rolls battery bank.