I do not own an original HC - I, too can only wish. I have converted a 15, 128, 66, 99 & 27 - There are advantages to each. I think the one I go to is a Singer 15 from 1902 but the 27 is right up there with it - I think it is the heavier balance wheels that I love on those. The 128 and 99 are lighter weight and for sure cuter. The 66 is a redeye and very cool.