Reluctant to raise the boar taint issue again, but I've never had it in traditional breeds - even when I've raised them to eight months old. I have, however, had it in commercial crosses, which mature much earlier (Landrace x Pietrain - sent them off at five months and could detect it).
Interestingly, went to an impressive farm in the Midlands last weekend (Robert and Lillian were there, too). Two youngish chaps (late 20s/30s) who have the largest herd of Tamworths in the UK - about 40 breeding sows, plus three/four boars, along with growers - all outdoors.
They don't castrate their boar growers, and slaughter at seven months old. And they sell to top London restaurants - all with no complaints.
I'm well aware that others will come back with comments, but I know dozens of breeders who don't castrate - and many who raise a young boar weaner, use his "skills", and then send him off for slaughter. I've done it myself, with no regrets/complaints.
Why not try it and see what happens?