Jimny "Hiccups" in Idle

Guys... I started a thread a while back as I had a similar situation, but the small differences were that the hiccups were limited to cold weather, dissapeared when the engine was warm, and often caused the EML to come on. This is what I did:
Ran 2 tanks of STP cleaner through the system
Result: hiccups less, but not gone.
Replaced the ignition leads and coils with EXPENSIVE ones.
Replaced sparkplugs with normal ones
Result: even worse.
Solution: aggressively cleaned out the white grease that I found inside the leads and coils
Result: Hefty hiccups gone, back to slight hiccups
Sent vehicle in for testing when cold
Result: slight misfiring detected (my ebay engine management detector did not find this)
Ran 2 full tanks of fuel with STP fuel system cleaner doing long runs to quickly (!) deplete the tank
Result: hiccups gone for a while then returned
Cleaned the ignition leads and coils again (found slight traces of grease that I swore I had removed)
Sent the vehicle in to have the engine flushed with some form of carbon remover.

OMG what a difference... the vehicle runs like there is syrup powering it. I actually cannot believe the difference.

So what worked?.. I believe it was a combination of everything I did. Anyway, I have been away for 3 weeks so hopefully it is still as smooth as silk when I return to the UK. (It has 150k miles on the clock, 2008 Gen 3)

why STP and not BG44K - very technical and scientific reason for that...... when I was around 16 I had STP stickers on my skateboard and thought they were super cool.. so advertising works I guess (I am now the wrong side of 65 and would break my neck if I tried to skateboard)