Please help—I'm trying find some pots for my beautiful Ultra Blues. I love this guitar, but it's too bright for me, and I want to try changing the pots before I invest in some new pickups. I want to switch out the stock 1meg pots for 250k, but I can't find the correct type. The stock pots have longer shafts with smaller diameter than anything I can find. I've ordered some CTS solid shaft pots but the knobs don't fit (diameter is too large). Please could someone tell me the where I can get a 250k version of the stock pots, or shaft dimensions the stock pots have so that I can match them? Many thanks.