I have a normal spaced set, that I can trade for your F-Spaced, if you'd be kind enough to trade. Also have a JB/59 set, normal spaced that I'd trade for them.
I've dealt with Stitch/Simon, Drew, and have 30~ transactions on eBay under the same name as a buyer, and seller.
Located in NW Chicago.
If there's anything wrong with my posting, I'm sure you'll let me know, so please do.
You don't need F-spaced. The magnetic field is plenty wide enough on the standard versions.