I like 4Me-tMPH more than 4F and i did a ton of the stuff years back.
Weaker by weight, very forgiving, and it works more therapeutically for me at moderate doses and equal or more at rec doses. People say it feels more serotonergic but i suspect possibly it's dopamine release and relatively weaker reuptake inhibition than MPH.
220/10g from TRCL, 175/5g domestic from a trusted vendor on DBG
2mmc is much more functional less serotonin release than 3mmc or 4, but yes more party thing.
4me-tMPH, that is 4-methylmethylphenidate, i enjoy more than 4F-MPH. It is not purely functional, but it can be at lower doses. Being a little less potent by weight than methylphenidate, there's a bigger window for error. Shorter duration.