I don't understand how you can make such a huge leap from one type to the other.
Okay, fair enough, I could see INTJ -> ENTJ, or INFJ -> INFP, but not INxJ to ESTP.
Dave, if you are an 8w7, you're probably a bit like me I can bet. Look at my results:
Type 8 - 10
Type 9 - 2.7
Type 7 - 2.3
Wing 8w9 - 11.3
Wing 8w7 - 11.2
Wing 9w8 - 7.7
Wing 7w8 - 7.3
Wing 9w1 - 3.9
Wing 7w6 - 2.4
According to the test, I have balanced wings. This makes quite a bit of sense.
That last point about SJs is false. There are some ESTJ Eights. The Mafia is a good example of this. Strong family ties, sense of duty and ability to undertake a lot of work. There will be conflictions with the SJ ideal, but there is certainly such a thing as an ESTJ Eight.
The only Artisan I feel at home with is the ESTP, and there are problems there. I hardly feel at home with the ESTJ (the only Guardian I could ever be), and I don't at all feel at home with any of the Idealists. However, three Rationals fit me; the ENTJ most of all, and a bit of the INTJ and the ENTP. My advice to you is to look into the four temperaments and see which one describes you best. IMO, Eights can be:
ESTJs
ESTPs
ENTJs
INTJs
ENTPs