They work, chisel care most important. I use what i have till I buy a dedicated machine in that case a chain and chisel mortiser. At the time I used...
IF you are in a trade you learn it instead of buying a gizmo. You can buy a super car and there are enough crash and burn youtubes of the people who...
Brad had different suppliers past and not sure which one. Had some offcuts and remember counting layers a few years ago. Have some other thicknesses...
if you have gone past the end I think some can drop down too low and not engage when you try and raise them. Do remember one putting a jack under it...