Jeff,
I haven't built a bench - yet - so my advice is worth exactly what you're paying for it. But I've been mulling some ideas for some time that I would be glad to share.
I read and skimmed four books:
Making Workbenches: * Planning * Building * Outfitting by Sam Allen
The Workbench Book: A Craftsman's Guide to Workbenches for Every Type of Woodworking by Scott Landis
The Workbench: A Complete Guide to Creating Your Perfect Bench by Lon Schleining
Workbenches: From Design And Theory To Construction And Use by Christopher Schwarz
(
NOTE: I didn't spend a dime to do it either - you go to your local library with the titles and authors and ask about Inter-Library Loan. Borrow the books, look them over, then buy the ones you think will be most helpful. If you only need a couple of pages from one, scan or photocopy them before you return the book.)
I've also looked at lots of videos and postings here and on other forums and I think I've gleaned some things that interest me.
1) I want to build a workhorse not a show piece. I mean no offense to those who build beautiful benches. I know a bench can be both, and I know that a lot of what goes into making those benches works of art also have practical application. However, I know ME; I'm cheap. And if I spend a fortune on expensive contrasting woods and lots of time on exquisite joinery I'm not going to want to risk harm to the bench, and that would defeat the purpose in having it.
2) I would probably construct the top with a substrate of laminated MDF, with a hard maple skirt and vise faces, and a replaceable inset hardboard surface. According to the
sagulator, a MDF top 3" thick (4 layers of 3/4" MDF) that is 24" deep with a 40" span between the legs, with a 3.25" x 1.5" hard maple skirt would withstand 133 lbs. of centered weight before it started to sag at all and 400 lbs. of centered weight before the deflection exceeded 0.001" per foot. It would really probably exceed that since the sagulator is really designed to calculate shelf sag and would not be accounting for the skirt on both edges.
3) I will make the skirt flush to the bottom of the bench top to make it easy to use C or F clamps along the edges to clamp things to the top. (The extra 1/4" on the 3.25" maple skirt is for the 1/4" hardboard which will be inset behind the top of the skirt.)
4) I will make the legs on the front flush to the skirt face so that I have vertical supports to clamp to when I have large panels in an upright position.
5) I will probably use
large quick release vises embedded in the skirt for both the front and end vises.
6) I am toying with embedding
T-track in the skirt and legs and having a removable deadman with T-tracks embedded so I can put
adjustable hold-downs where ever I need them and really clamp in a long board or panel instead of just having it rest on a peg.
Anyway, those are my ideas so far.
Hope this helps.