In a post several weeks ago I mentioned that I have been given a very early 18' 1921 OT Molitor. This one is unusual in that the outer rails are held in place with steel nail pounded in from the inner rails at most every rib - the exceptions being at the two ribs surrounding a seat or thwart bolt as well as the tips of the outer rails where the nails are pounded from the outside. The nails measure 1-3/4" and about 0.075" diameter (difficult to measure on account of the rust) and have a minimal head like a brad or finish nail. I'd prefer not to steel nails. Can someone recommend a good substitute? I can predrill the holes through the inner rails and ribs (1-1/8") but the nail will need to be sturdy enough to take pounding into 5/8" of the mahogany outer rails. Plus I'd like the head to be relatively small and unobtrusive. Suggestions?