Conclusions

Disclaimer: This is a description of what I did. It is not a recommendation that you do the same. If your hoist falls on you and crushes you to death, don't come crying to me.

Although I encountered as many irritating issues with the HAPP90 as are reported with the MaxJax, these were early days and I am told that better and more complete documentation is now supplied, as well as a FAQ section on the website.

The hoist itself seems very solid and robust, and is quiet and a pleasure to use. It is a pity that my own experience was spoiled by the poor quality of the information and fixings supplied, and a lack of thought about the electrical installation.

I am assured that the concrete anchors now supplied are in fact a tight fit in a 24mm hole, and that a quad-head masonry bit is recommended for drilling the holes. If I had known this at the time I would not have spent extra money on diamond core bits.

The electrical situation remains unsatisfactory. There is not much room in the switch box and a better solution would be to locate or have made a suitable bridging plug for use without the limit switch.

If I had to install a hoist again in an unknown concrete slab, then I would saw out a couple of sections and pour new, deep footings for good quality wedge anchors.

I would also not bother with smaller drill bits, but use a single pass of the right size carbide bit in a hammer drill. This is in fact what HAPP currently recommend.

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