Help please - Aluminium GT serial numbers

[kingoffootball]

Couple more Hodaka and some Sanfa (?) numbers:

H4C019039	RTS3	https://www.retrobike.co.uk/threads/purple-gt-rts-3.320115
H4H08695		https://www.retrobike.co.uk/threads/gt-triple-triangle-what-do-i-have.372105/#post-2767896
SAS5H0159		https://www.retrobike.co.uk/threads/need-help-identifying-gt-frame-and-rockshox-fork.279309/
SAS6A1084	Pantera	https://www.retrobike.co.uk/threads/help-please-aluminium-gt-serial-numbers.485049/post-3639525
SAS6A2763		https://www.retrobike.co.uk/threads/how-much-is-a-zaskar-le-frame-worth.295424
SAS6C2013	Pantera	https://www.retrobike.co.uk/threads/1996-gt-pantera-rebuild-complete.52791/
SAS6C2349	Avalanche?	https://www.retrobike.co.uk/threads/how-old-is-my-bike.340633
SAS6H0062	Avalanche	https://www.retrobike.co.uk/threads/off-to-pick-this-up.439191/post-3203576
SAS6I1307		https://www.retrobike.co.uk/threads/help-with-gt-frame.390920/
SAS6I2699	Avalanche	https://www.retrobike.co.uk/threads/what-is-my-gt-mtb-model.433998
SAS7F1526	LTS	https://www.retrobike.co.uk/threads/gt-lts-serial-help.167833/

I only had a few Sanfa serials recorded, so this helps add detail for those. Based on that, my current thinking is:
- SAS prefix used until they changed it to just S in 1998
- Followed by a similar system to Hodaka - next number is the year of production, then the letter is the month?
- If the letter does give the month (I haven't seen this confirmed/denied) then it seems Hodaka and Sanfa used different systems - e.g. Sanfa have some with the letter I but I think Hodaka skipped that

Some more Hodaka frame numbers would help confirm/disprove the month theory.

 

[kingoffootball]

I only had a few Sanfa serials recorded, so this helps add detail for those. Based on that, my current thinking is:
- SAS prefix used until they changed it to just S in 1998
- Followed by a similar system to Hodaka - next number is the year of production, then the letter is the month?
- If the letter does give the month (I haven't seen this confirmed/denied) then it seems Hodaka and Sanfa used different systems - e.g. Sanfa have some with the letter I but I think Hodaka skipped that

Some more Hodaka frame numbers would help confirm/disprove the month theory.

There are some that don't quite fit with that. This one:

SAS6I2699

Avalanche

https://www.retrobike.co.uk/threads/what-is-my-gt-mtb-model.433998

Would suggest a 1997 model, since I would need to be later in the year, but as is suggested in the thread the colour of the decals suggests 1996 is more likely.

I should caveat all this by saying I know far less about the aluminium models than the steel and less about the later half of the 90s than the earlier half.