Hey Rune! Great thread. I think you've covered most of the smaller niggles that several of us have encountered, including myself! Mine is finished and has flown 13 flights so far. Looks very promising, though I'm still finalising the trimming.
I can also recommend to builders to check ALL measurements and markings for yourself (but then we should do that anyway, right!). I got a lot of very good advice from several buddies, particularly one who also has recently finished his Oxalys.
My Oxalys is approx 4900g RTF with 1.60DZ and "short" pipe. Dual elevator servos (Fut 9650's)mounted simply in the fuse sides under the stabs: robust, easy to access and you can use shorter servo arms for best mechanical advantage. Also had to "fill" the stab/ fuse gap as you mentioned. CG is much further aft than in the instructions, mine is 20cm aft of the "flat" L/E, ie 26cms forward of the true T/E. Even that seems quite conservative, I'll probably move it slightly further aft by the time I'm finished. Had 30g lead in the nose initially but have removed it now. Control throws are all smaller than I thought initially as all surfaces are VERY powerful, especially the rudder! I'm not using the Canaliser yet although the mounting points are done, thought I'd try it without at first.
Overall, I think it's a very good package for the price although TS could certainly work on some of the details as mentioned. The finish is very good, much better than any other model I've owned or could hope to achieve on my own.
Now all I have to do is try to do the aircraft justice in FAI.................that's gonna be the hardest part!
Best of luck to all other TS Oxali owners (there's a good many around now!)
Bill.