This might be a bit off topic (What I am writing here may or may not be valid for a H14)...
On the Hobie 16 new (replacement) shrouds are about 8 cm longer than those that were originally installed on my mid 80's hobie 16. I assume that at the same time the effective lenght of the forestay was increased. IIRC these changes were made to allow to rake the mast further back. May be you have to get forestay and shrouds in a "combo".

Patrick