I have an upcoming AY flight departing SIN at 9pm. For various reasons, I would like to do a same day MH round trip to KUL the day of the AY flight, say departing mid-morning and returning late afternoon. I'm a OW emerald and planning to fly economy.

I will have a rollaboard and back pack, and while both are carry-on size, the weight will exceed MH's carry on baggage allowance. I can use left luggage at SIN, but that means I'd need to re-enter SIN to claim the bags and check them into AY. As an alternative, I guess I could check the bags with MH at SIN, collect them at KUL, and then check them there and request interline to our AY flight? Or, we could simply try to carry-on the bags and deal with any issues at the gate? I don't think there is an airside left luggage or lounge at SIN where we could leave the bags for several hours?

I'm not opposed to checking the bags - just want to find the simplest solution possible.

Thank you in advance for any ideas.