Im sure the TODA could push 280 I've know people push 240 as you have said but they have all been on stock engines not forged so alot of people dont want to push passed 1.2bar on a td04 on a stock engine But im sure if Toff on here still had his TODA ecu on his glanza now with it running a forged 5E he would see how far it could of been pushed! And the EMB is just like a plug and play it piggy backs onto the stock ecu but rather then something atached outside the ecu the plug and play have it inside. Some have an extra chip some have an extra board some do more then others! Pluss everyone uses EMB because its been tried and tested but if alot more people where to try these plug and plays and ended up with good results im sure we'll see alot more people useing them