Marshall MG15DFX 15 Watt Compact 2 Channels 8 Speaker Practice Amp "mg15hfx" Questions

I need a manual for a marshall mg15hfx guitar amplifier I got mine here... http://www.marshallamps.com/downloads/files/MG4%20microstack%20hbk_ENG.pdf great amp, I bought a used one and it is now my ...

Can i boost the wattage of the mg15hfx? When openned it has all mg30fx boards in it. is it just a different chip or capacitor? Often the boards will be the same, but the power transformer MAY have ...