I hope I'll be proven wrong but I suspect you may have some difficulty getting the flywheel off with that arrangement.
Unless you have specified high tensile bolts then tightening the centre nut will only serve to stretch the bolts and flex the spider. When the flywheel doesn't come off the temptation is to tighten the centre screw even more which puts more energy into the system. Keep doing that and one of two things will happen.1) You will bend the centre bolt and/ or the spider (I know this to be true!) or 2) You hit the centre bolt and all that stored energy is transferred to the flywheel.
If you are lucky you won't be standing immediately in front of it as it comes off and your shins are used to halt its progress. Remember to provide something soft for the flywheel to land on (shins and other body parts excepted).
A better solution is to have three 1" steel posts made, threaded at each end to take short screws which will limit flex in that part of the system.
(Photo's courtesy of Thomas Powell)
Note the additional support that has been added under the screws.
With a rigid system like this you will have eliminated most, if not all of the flex.
Tighten the centre bolt give it a good belt with a lump hammer and the flywheel will normally come off without a murmur.