http://wrvids.com/F-Zero_series/F-Zero%20MV/TAS/b3_tbk_1699_tas_lossless.avi (63 mb)
The JDT (where I skip one dash plate) is only slightly faster whilst the last part saves about 0"10 if done well. The best setup in the end will still make you hit the wall before the finish line. It's still the fastest way. Extending the drift into the finish line normally without JDT (like you can do on Q3) will always be slower no matter what.
Edit:
SUGARBEAMZ
After I watched my 17"08 again I noticed my drifts through the motion plates could be improved. The problem was that whenever I went pixel-tight into a turn and then saved at that respective spot, I started my next drift from right there or later (I usually use corners as checkpoints). What you can actually do is go back a little (after saving), knowing your drift will be pixel-tight, and give yourself a little more leeway for the upcoming drift. With that I was able to give those drifts a more a natural look while at the same time they were also a little faster. I was able to push my time down to 17"01 by reworking almost my entire run. I tried really hard to find holes in it but I realised I've already plugged them all. I was stuck at 17"01 for about 2 hours until I somehow managed 17"00 by altering the last JDT a little. I applied an extreme angle (visibly more than 90°) and then adjusted JV for the final drift. I really thought this can't possibly go lower. Out of sheer curiosity I took a closer look at the very ending. I tried to go for different button combinations right before and after the wallhit. What eventually did the trick was a blast turn a few frames (1 - 5 made it work) before the impact. This made JV bounce off less than normal and thus it reached the finish line 1 frame earlier too. That was just what I needed!
I thought the same thing that happened to JKT would happen to me. 15"00 / 17"00 and nowhere to go... but I was somehow able to squeeze out another 0"01! 