I would like to add that I prefer to take my time, meditate on these things and ponder them in my head. The way I see these these things fitting together has taken me YEARS to work out into any kind of way that is satisfactory to my thinking.
These things do NOT come overnight.

However you are correct that moving the onset of the seventh trumpet to day 1290 is the 'gist', and for now I feel this offers a more satisfactory interpretation... I am however my own greatest critic and would prefer to take the time to DETAIL this rather than hastily throw it on the table. To me, just any old solution in order to satify me for the present is really no solution at all.