Shifting Issues

I can get the tractor into the gear I want, though reverse often poses a challenge. However, I can't really imagine trying to shift this tractor on the fly. Are the rest of you able to go through the gears of these tractors while underway? Or is one supposed to put it in the chosen gear and leave it there? I'm totally new to tractors, so if this is a naive question please bear with me.

The second issue is that the shifting lever swivels in its mount. When I move it from second to third it rotates counterclockwise and the knob actually bangs into the gas tank. I have to keep my fingers clear. Is this normal?

Thanks for your thoughts in advance.

The injector issue is on hold. The other day I took the tractor out and ran it for about an hour, much of the time at 2/3 throttle. By the end of that time it was running clear and
smooth, although backfiring once when I decelerated. This is turning out to be a real nice tractor. I now have a custom made roll bar on it too.

As for selling it I think I will wait a few months. I've put so much time into it and am so proud of what I've accomplished that I couldn't possibly get for it what it means to me. Maybe
by the spring I'll be tired of looking at and will want something more realistic for my property, something in the 25hp range with a loader. You're welcome to take a look at it anytime you want. If you send an email to trunorth@flash.net, I'll reply and attach some photos.