Ummm yes...the Marstrom T mast is made by Marstrom...though theorectically the plans/layup schedule are supposedly to be made available to anyother builder now that the 2 year exclusion period is over.

Other interesting point is that the T mast runs about ~$4.5-5K USD...seems high but the currect price quote for an I20 stick is $11k USD. Quite remarkable when you consider Marstrom's are much tigher controlled in terms of flex/engineering, they are known for charging premium rates and work is second to none.