Originally Posted by
ermen
2. Going from where you are in T1 to T4 would take ~30 mins each way (more if you are arriving from the C gates!). So you will be wasting 1 hour just going to T4, then coming back to T2/T1...
...5. Some dodgy blogger said that it was possible to go Airside T4 to T1. I have not tried that. Maybe you can try if you want to do that.
Took me 23 mins from T2 Gate 51 to T4 Gate 21 excluding lounge detour so I don't doubt your 30 minute claim.
(5): T1 arrival, exit landside and pick up baggage --> (landside) T4 Check in, re-enter restricted area --> (airside transfer) T4-T2-T1 --> (airside transfer) T1-T2-T4 <-- That's like 2 hours - if lounge hops earn club miles...?