With the Dumas unlimited kits long gone, the guys at the "1/10 Scale Hydroplane" page of FB go here and they are produced as big as 1/6th scale:
For plans: https://www.newtonmarine.com/
For kits: https://mlboatworksrc.com/
😃
Assistenza Model Boats Website con un abbonamento e sblocca nessuna pubblicità, download di immagini, puzzle passati e altro — a partire da poche sterline al mese.