Thank you very much. I will try to grind the underside of the cap iron (I have the classic Stanley type) on an edge of a water stone to get only the center down.I find that the only way I can get a cap iron to contact the iron without any gaps,
is focusing on the center of the cap iron when honing the underside...
i.e using something like a stuck down short abrasive strip not as wide as the cap iron is, or the corner of a hone.
Otherwise I end up with a gap at an end.
50 degrees on the top side is what most folks using the cap iron suggests,
David W has wrote quite a lot about the cap iron, in articles like wood central, and here, and has made quite a bit of youtube content about using the double iron plane, which if you need use the cap iron is one of the only sources that is thorough on the matter.
Not that it's complicated or anything, but its hard for some to let go of some of their fundamental beliefs which they have followed since the beginning.
i.e having tight mouths mostly, but also steep bevels,different frogs, back bevels and so on
See the shavings and choose for yourself and decide.
That's what your looking for if your wanting more information on smoothing,
but you need a bench first and I suggest having a go at finding a top for your sawhorse(s)
A pair of stiff beams jointed and affixed or even clamped to a solid core or fire door to prevent droop, would be an instant bench if you made up some of these plywood risers
Butt it against the wall or similar thing which might be against the wall
View attachment 97339
Alternatively maybe this video might be of interest
All the best
I needed to move out of the garden shed out to the garden, as we do not have enough space and store many things in the shed, so I have built two sawhorses and a 50 mm top. I made them removable, so that I can pack everything and store it in the shed during the winter. I have connected everything with screws or bolts. But when I started to plane, the whole bench was tilting towards the planing direction and back when the force was released. It was no fun, and results were pretty bad as well. So I have decided to keep the top and build a proper, bench with 100x100 mm legs and mortise and tenon joins next spring. I have calculated that total weight will be 60 kg. I need to make this bench smaller (150 cm x 60 cm) and I will move this bench back to the shed, so it will be inside. I want to create a low shelf a few cm above the ground and I will store there my thickness planer and compressor (of course I will cover them, so they will not be full of shavings), and that will add another 50 kg of weight.
I am attaching the photo of the original top on the sawhorses, that did not work for me.
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