Was gonna reply to scienceguy’s thread, but didn’t want to derail his log. So I looked around, and hey, here’s a great spot.
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Both Titleist and thoughtfulgold had pictures with small electric heaters between their feet. Several other people have mentioned using an IR heat lamp.
I have an IR heat lamp as well. I didn’t procure it for PE, but it works for it just the same.
Target heat with a pad is hard to beat though, if you can’t afford US. I’ve been considering this pad:
Amazon UTK Heating Pad Wrap
It only has 8 jades, but that should be plenty to heat the whole member. Especially if left to saturate and you rotate it once in a while. I rotate my regular heating pad already, because it has hot/cold spots.
They do have two lengths, 47" and 20".