If you skimmed past the Hobby Show pics, you may have picked these up, but I think I forgot to mention these. The Long Wheel Base Prototypes from Yokomo
The DIB would need an upper deck to extend it to the around 280mm mark. These are still 10mm shorter than the Street Jam ML Chassis, which would be a BAD decision in my opinion.
The DIB would also suffer from massive chassis flex. Ive seen some lipos swell after some DIB action. If the lipo is used to support the chassis upper deck, I don't think thats a good thing.
The DPM would need the chassis, upper and lower deck and of course a longer rear shaft. you can see the battery can be mounted in 2 positions for preferred balance.
The difference is noticible between the stock versions.
So if you are after versatility. It may be time to upgrade that drift package to the DPM.