Not having looked at your link, let me just say that I've considered the "8th Day" (following Tabernacles) viewpoint, and have concluded that it has far less "connections," if you will, than that of other choices/considerations.
Have you considered that, during the "7 days [of Tabernacles],"
all the nations were welcome to come and participate; but on "the 8th day," God met with
"Israel alone". Why would our Rapture (pertaining solely to "the Church which is His body") take place at such a time, especially since Rev19 shows Jesus "RETURNING" to the earth, and 19:15b says [re: "the nations"] that "He shall rule/shepherd them [the nations] with a rod/sceptre of iron [righteousness and strength],"
… and the "BLESSED are those [PLURAL] HAVING BEEN CALLED/INVITED [i.e. DURING the trib yrs] unto the wedding FEAST/SUPPER of the Lamb" (which is the promised and prophesied
earthly Millennial Kingdom, commencing upon His "RETURN" there; in contradistinction to "the MARRIAGE" itself, having already taken place [aorist] in Heaven, by that point in the chronology, and He is now "returning" as a ALREADY-WED "Bridegroom" [WITH His ALREADY-WED (at that point) "BRIDE/WIFE [SINGULAR]"], where the Matt22:9-14/Matt25:1-13/Lk12:36-37,38,40,42-44 contexts take up
the next scene, in the chronology]). "BLESSED" parallels such as Daniel 12:12, Matthew 25:31-34, etc... (MK-entrance references)...
I see far more evidence for:
--a "spring-to-spring" 70th-Wk/7-yrs/tribulation period
--"2520 days"
precisely, between [what is depicted in]
Rev5-and-Rev19 (where "kings go out to battle" [chpt 19] and were "crowned" at a very specific time, per OT passages)
--too many other things to list here, at the moment...
[I need to go eat my peanut butter and jelly sandwich
]