My friend bought a Macgregor 21 a few weeks ago and I helped him rig it all up. Everything is good but... my boat uses turnbuckles all around. His boat uses shroud adjusters and a stay adjuster for the back stay. I am not familiar with these. The only turnbuckle on his boat is on the forestay. The problem I am having, his lower shroud on both sides are too short, even with shroud extenders. So my question is, what is the best way I can extend the shrouds? Would that be to just link two extenders together?