haha.. actually my DIY plan is very very simple one, replace the current 180km/h Japan spec face plate (numbering) with the local spec (260km/h) one, cos i found out that the my speedometer needle still pointing at the same speed as in local spec meter after i changed the whole halfcut+dashboard.
Actually one of our sifu here pointed out to me before that i can somehow do some soldering to adjust the needle, but my shaky hands are not too good in electronics items, and worried it'll damage the needle.
Hope my simple DIY plan doesnt disappoint you...