Very balanced model, light, compact, comfortable. What did you deal with: Assembling furniture, screws, self-tapping screws - of course, no problems at all. one acc is enough to drill holes and tighten about 20-22 furniture screws. Drilling holes in laminated chipboard with crowns up to 150mm in diameter. Twisting hardened (black) screws 6x200 into plastic dowels that are narrow for them - at once and with a squeal (I tried with a screwdriver, I could not budge). Screwing 12 screws into wooden (home-made) dowels is easy, but the acc is heated, you have to wait until it cools down before charging. Bottom line: Excellent model, comfortable, reliable and multifunctional.