Mine came with a fiberglass belt guard that kept falling down as well as looking like an afterthought. I got rid of it completely and substituted an old-model aluminum guard that covers only the headstock pulleys and flips up out of the way easily. It mounts on the back gear shaft. See photo. The countershaft is well out of reach, anyway, so I have no concern about its lack of a guard.
I also gave up on the belt tensioner. Its design makes it push on the side of the countershaft assembly, making it want to twist. Try as I might, I could never bolt down the countershaft solidly enough so that it would not turn, eventually, because of that side pressure, and mess up the belt tracking. So, I rigged up a lever-operated rod that locks in an over-center position such that it pushes on the center of the countershaft support and the center of the headstock, which I find much more satisfactory, albeit a bit kludgy in design and execution. See photo.
The gear cover, as delivered, was held on with a knurled bolt and a knurled nut which, when removed, released the fiberglass gear cover. Older lathes had a hinged aluminum cover, which seemed better to me, so I decided to put hinges on the fiberglass one. This involved putting a plate on the end of the lathe bed to hold hinges (the end of my lathe bed was already tapped for two machine screws (8-32, maybe??), which made attachment of the plate relatively simple. I made up two of about the simplest hinges imaginable, two short bars of aluminum, the upper one with a fixed pin that slides into a hole in the lower pin. See photos.
To latch the cover I made a standoff of the correct length with a 1/4-20 threaded hole in both ends. The outer end is turned down to fit the existing hole in the cover so when the cover is swung closed the cover fits over the stub. A short 1/4-20 bolt and washer hold the cover closed. See photos. More photos in next post.
Another thing I've done, which I think I've already described in a previous post somewhere, is slide the headstock about 15" to the right on the lathe bed so it is to the right of of the bed gap. IMO the 10K gap bed design leaves something to be desired, so I've put it outside the section of lathe bed that is being used. Doing so left the tumbler reverse gears exposed, which required making an inelegant but effective cover for them. You can see it in IMG_1803.jpg. If anybody is interested I'll describe how I moved the headstock again.