Thanks Brummie,
I'm now quite tempted to grab quite a few Turnbase minis and churn them out in 15/20mm 
Off course you are, who wouldn't be ?

.
Just keep in mind that as I said, downscaling or upscaling create new venues BUT also creates problems ( opportunities for improvement

).
For eg. Weapons, ankles & elbows become fragile nightmares when downscaling and are a pain to fix as they are fiddly.... having said that they can easily be
fixed by planning before hand by thickening or making more robust joints in a 3D prog.... I use 3D builder mostly... very simple & effective.
Also , when downsizing presupported models you are also downsizing supports, therefore what works in 28/32mm may not work in 15/20.
Think ahead , from experience over supporting is better than under supporting.
I use Elegoo water washable on a Mars 2 Pro with standard settings.... oh a cleaning station, (I have an Elegoo Mercury) is super for cleaning 15mm minis...... & I always leave minis to dry first then cure them the next day.
Hope this helps
Z