Hello,I want to add a LAzy Jack to my boat, a 1986 Newport 28.Any comments on how easy or difficult installation is, oron how they work?I can get a Harken kit or a Schaeffer kit, is there any realdifference between the two?And lastly, my boat is 28'. The small kits are for boats 22-28and the medium for 29 or 30 and bigger. Will the small kit beOK for my boat or should I get the larger model?Thanks!Barry