Fairly agree.
I also believe "the 144,000" (of each of the tribes of Israel listed in Rev7) will be "sealed" (presumably for protection, based on the wording in 7:3 [see 8:6-10]), and "sealed" before the 1st Trumpet commences, so PRIOR TO the "5th Trumpet / 1st Woe unto the earth" MID-trib...