Hello There! I was interested was is your opinion regarding portable devices used for repairs and for small fix or DIY projects, I am talking about portable screwdrivers and soldering irons, maybe other type of portable devices you know. I would like to know your opinion, is worth using them or its just a useless waist of time, can those portable things be used for a bigger projects, or should I buy a portable screwdriver from BOSCH that looks like its a PRO stuff