Dave,
Obvious they wouldn't make it as Thorne 'firsts' - 'cos the've got knots in 'em! Apart from that they look pretty good to me. Perfectly adequate - and it looks like you plugged the screw counterbores rather than filled? A good job well done.
I am going to ask, picky I know (some will say), but did you groove the sides for the end walls? If you did, I reckon the butt joints on the end bars are perfectly adequate for a good useful life (and if you didn't it may not make a jot of difference because the rest may fail before the joints anyway, or they may outlast you).
I am a belt and braces person so I would have (perhaps) made the end bars slightly wider to acommodate two long screws (of smaller section) at each end of the bars. I could then locate the screws slightly on the tosh so they cannot be pulled out easily (as a single one might, in umpteen years time)
Please take this as constructive criticism, if you feel I am criticising your work. But I am, in no way, doing that. I reckon they will last well and you have done a great job that you should be proud of. They will, of course, be as good as a Thorne first at about 1/4(?) of the cost - depending on your source of materials.
Compared to a designer plastic hive around 500 quid.......no, there is no comparison needed. One colony housed, versus however many you could make up for that outlay and in a natural material, repairable, etc etc etc makes yours a veritable winner.
You clearly have a low cost table saw (that is cf a Wadkin or other expensive item), a stubby plane, screwdriver and a measuring stick. I would imagine that may be all you needed, apart from a bit of abrasive paper. What other tools did you use? This is simply to demonstrate how little you need or how much you might use.
I use a planer/thicknesser, radial saw, bench saw (simlar to yours), router, belt sander, orbital sander, drill, pillar drill, screwdriver. To be frank, the bees could not care a jot and the finished product is no better, no worse than yours, for all those power tools that might, or might not be, the first 'to hand' for the job.
Congratulations on a job well done.
Regards, RAB