well i sit and wait weeks for a 4.xx cfw for dex and then this comes along. couldn't have wanted more. Cex + Dex = REX , lol you got to love it, the ability to switch between cex and dex at will, without having to change fw is just excellent.
i semi bricked my dex when reverting back to cex, as i couldn't get the cex fw to install after flashing back to cex. leaving me with a cex system with a dex fw = semi-brick. this fw takes all those risks away. no need to change fw just flash cex or dex and thats it.
Rebug have outdid themselves with this fw, it will be a long time before anyone comes up with anything to beat this. i reckon they did 4.21 so they could save their 4.30 version for after they have worked out any bugs etc, so it will be a nice straight update for any rebug users when it comes out.
i could be wrong and 4.21 is all were getting. but with the extra features its got and the REX tag (cex/DEx) all i can say is this firmware blows all the others out of the water.
well done team Rebug and thanks loads, hopefully this will fix the e3 issues i'm having with my missing MBRs