not touchy....just wondering why you mention land entries in first place. OP is talking about doing runs to KL and Singapore; much easier done by air than land.
I didnt once mention anything about land entries.....as for air entries can you please direct me to the reference for 4 allowed entries before being questioned? Cheers.
while there are no restrictions on number of 30-day visa exemption entries by air, you run the risk of being stopped at IC if they see back to back to back use of this.