I've only used one Skinner, and it's on a Ruger No. 1, but I like it.
It's solid and relatively compact.
The William's sights I have are not the gallows type, they sit on top of the reciever on a couple of .22's.
They are made of aluminium alloy, and are pretty sturdy, but they're not hard steel.
You might want to look at the XS as well, they are also compact and rugged.
I have one on a HVA 9.3x62 and one that fits weaver bases that is currently without a home, I like the XS a lot.
Brownells offers a long stem XS post that is threaded to accept Wiliams aperatures.
The stem can be easliy shortened if it's too long.