Re: Do you like your Gibson F-9
We like what we like, and dislike what we don't. An obvious point. The F-9 may be a great mandolin, but not for you. Gibson F-9's have an overall good reputation (other than with kirkw101). You see them up for sale because Gibson's sold a lot of them over the past decade or so, and many people buy them "on the way up" to a more expensive instrument, Gibson or otherwise.
If the Gibson doesn't meet your preferences with regard to neck shape and fret size, rather than thinking about "jiggering" it into a different configuration, sell it or trade it in on a mandolin of equivalent quality that's more comfortable for you. You'll probably have little trouble making a deal for it. No discredit attached to experimenting with a good-quality instrument, and finding it doesn't meet your individual needs.
Gibsn: '54 F5 3pt F2 A-N Custm K1 m'cello
Natl Triolian Dobro mando
Victoria b-back Merrill alumnm b-back
Stradolin Vega banjolin
Sobell'dola Washburn b-back'dola
Eastmn: 615'dola 805 m'cello
Flatiron 3K OM