If you do not do it again according to the reviews of other people movement will not be usable with giggis. It is necessary to polish the slide part of the main scale and the leaf spring with an oil grinding stone. We originally had four stars so that it would be a good tool to know what we had in review and buy it and fix it. I just want the manufacturer to do his best.
Even if you try to match it with the drill's warranty, you can not use it very much as it is purchased. When I removed it, the sliding part was rough and the uneven waves during polishing remained. Also, the spring material pressing the slide groove is rough. It was necessary to polish with an oil grinding stone and to use it by pouring lubricant, but the difference with the product about 30 years ago (no manufacturer's memory) was too large. As you can see when assembling?