somewhere on ShareCG.com (I believe) is a “V4 Adjusted” ..... get it, install it, then use the Clone - V4 adjusted .. for shirts .. and some otherstuff .... also, make sure you Check Reverse Shape from target in the Transfer Options, and try a Smoothing modifier. I’ve played around a bit an found you can even fit clothes from the Millenium and other characters as well. For this, import the clothing, manually adjust it as close as you can, Export ( make sure your at 0 subd ).. and use that as a morph. Delete, reload, add your morph. then either change the Rigging in Edit Menu ... or Convert to Triax bla ..... then do the Transfer ..... using Genesis - Current and “Item” - Current (using the morph). I’ve done shoes, hair, clothing and other odd Items. Smoothing is the only problem you’ll run into, some Items from the past are just too low poly and parts are not attached and such, smoothing makes them work !!