Hi Timmer,
Great job on your first boat, congratulations!
I must admit that the picture showing the rather awkward allignment of motors and propshafts caused some severe frowning on my part, I'm guessing you don't need a speaker system to emulate propulsion noises...
Seriously, the universal couplers are not designed to cope with such extreme angles for longer periods of time, the bearings of all components around it will suffer and wear out, possibly resulting in leaky stuffing tubes.
Also the long pieces of motorshaft to the couplers and the unsupported pieces of propshafts are prone to resonances and potential damage.
If you have access to the propulsion, I strongly suggest you fix the allignment and general set-up for better performance and a long troublefree boatlife.
Regards, Jan.