I built my Arriba using Polycore, DB Fibreglass and Carbon. Luna is almost 2 years old and is standing up very well as our tender to Chemistry. She is in daily use transporting everything and everybody to our Charter Cat. She rows exceptionally well and sailing is a delight. Currently we use a 2.6 4 stroke outboard but will change to an electric when available. Looking at the waterline and comparing it to the builds featured on the forum I do not see much difference. Build time for the hull was around 300 hrs as stated by Doug Hylan. Another 100 hrs for finish, rig and fendering.