Glen-l has set the standard for boat plans for decades. 3 responses to boat plans & patterns. glen-l history photo #5 | boatbuilders site on glen-l.com says:. Glen l book of designs: 2012 book of boat designs includes free boatbuilding & supplies brochure and price lists and a free set of dinghy plans.. Glen-l boat plans. discussion in ‘metal boat building’ started by jack richards, jul 30, 2006. joined: feel free to email me directly. firstname.lastname@example.org.