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Agree with Mark - that amount of adhesive will probably negate the advantage of 6 point mounting - your redesign should help.
The analysis that you found of the glued mirror includes a cubed scaling term, so you can divide the results by half to get something applicable to your system - and then ask yourself how many times you will be viewing at the horizon.
Suggest that you leave it as is and try it out - change it only if you can detect any real effects. I have a glued 12 inch GSO mirror in a 9 point cell and can just see the effects of adhesive mounting in out-of-focus star testing. However, there have been two occasions where the mirror crept sideways enough to run into side supports that were put there as a fail safe - then the resulting astigmatism was well and truly visible - even in focused images. Equatorial mounting will rule out most edge support systems and glueing will probably be better than anything else you can do. regards Ray
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