Have a small setup and tried about everything save for a hot plate. Usually takes 14-18 castings to get my Mountainmolds 475-440 single cavity mold to reach temp.
Tried dipping the corner, dipping the sprue plate tip, laying block inverted on the pot lip to heat the sprue plate first or slip a corner in lead with the sprue touching the pot lip to warm up both simultaneously. I would’ve thought it’d take fewer castings to warm up a 1x mold with such a big boolit. Just nature of the beast? Not a big deal, just a mild annoyance.