Yup~! I have convert to "digital" distrbutor. Compare to "contact point" distributor, "digital" distributor make the engine output more smonthly, and you don't have the problem of changing the contact point.
If I'm right, the contact point must change with in 50,000km, when contact point worn out, the car will lost a lot of power and high fuel consumption too.
About carburetor spray, normal price are between RM20~RM14. How to use it? First let the engine idle run 5 minit, then spray around the carburetor, open the throtle at the same time when you spray, but remember don't RAM too high of RPM.