My adapter board for connecting an LPFRS / LPRO / OCXO to my BNC (and now SMA) connector board has a place for a 10K EFC adjustment pot (0.375 x 0.175" footprint). I'm looking for recommendations for a cheap, low-ish tempco pot. I have a few nice ones with a house number on them, but the Bourns equivalent is $25 each.