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Adam Cherubini, NJ
>For me, and I know this doesn't apply to everyone, I had the choice between a SW S#45 an a wedge-armed wooden plough. After a few years of use, I choose the woodie and sold the #45.
I found the #45 more difficult to set-up. The double skate requires the fence to be parallel (or the skate will hit the inside of the groove). This isn't obvious until half way through the groove at which point screwing with the fence isn't exactly high on your to-do list.
For small cutters the double skate is even worse. I tried removing the outer skate, but the skate that remained was off center and I didn't like that.
The adjustment/locking mechanism is especially hokey. Adjusting the blade or locking it moves the blade. I guess you'd get used to it, but believe it or not, hitting a wooden plow's blade or wedge with a hammer seems more elegant in comparison.
I didn't have the beading sole, so I can't objectively compare the performance of the S#45 to a wooden side bead. I can say the shapes created aren't the same and the wooden plane's fixed fence is a clear advantage in a shop where time is money. I don't have a reeding plane and wish I did. If you can accept a S#45 bead, you have the capability to make reeds as well. Something I can't do at the moment.
Since you mentioned the S#78, I guess I'd like to throw in my agreements with an earlier poster. When I make a rabbet, I use a small cutter in my plow to form the shoulder. Pushing an 1/8" cutter is almost like using a marking gauge. The work goes fast. The plow's depth stop gives me a nice shoulder at a consistent depth. Then I waste away with a chisel. The roughened bottom is planed smooth with a rabbet plane. I feel this approach is both faster and gives a squarer shoulder than a S#78 can do.
So I recommend against both the S#78 and the S#45 for the reason that better alternatives were available to me. If you don't have access to wooden planes, or they aren't practical for your environment, then by all means you'll be able to work with the metal stanleys.
Before you make up your mind, I'd like to suggest the following:
1) See if you can borrow a 45 to try.
2) I forget where you're from but if you are in my area, you are welcome to try my wooden planes.
3) Consider a S#46 in lieu of the S#45. I've never used this tool and have always wanted to ty one.
Adam