sx350 box smaller tactical switch and 510 connector hole

this is an alternate version to the previous design which is a lot smaller in dimensions. i was able to take 1cm off the depth...note that the tactical switch hole and the 510 are just incisions and may need to be dremeled wider also a small incision may be needed for the battery holder to connect to the 510 base or the battery holder may need to be modified ...
the parts i had in mind are found here:
Tacticle switch:
http://www.ebay.com.au/itm/231254950279?ssPageName=STRK:MEWNX:IT&_trks