I would suggest turning the drill into a quarry and use the power tool though, but that is my own preverence.
As for the weight, 25kg is the max witout speed loss, this can be compensated in few ways. If you use force field armor instead of the regulair moduals (probly wrong on the names, but you get the idea i hope, if not just say it). Or use walk assist to speed up. Or cut down in batteries as they weight alot. From my own playing with it, if you have a kinetic generator at max (4kg) and two elite batters at max (10kg each) you come to a total of 24kg while still having everything. Not all parts of the suit need a battery, as long as something in the suit has. Theoritcally you can put just one battery in a tool and still use your armor.. as long as your tool is slected. Altough i would suggest to put batteries in two parts of armor, which dont matter because the suit just doesn;t care