I have an opportunity to purchase a 1996 Spring 90 12/14. The extra 4 shafts and treadles were added in 2004. The shaft ends have been replaced with the new version that eases moving heddles, but I hope you can tell me if there have been other significant upgrades or modifications that I should inquire about. The loom is 1200 miles away so I cannot compare it to one acquired in 2019. Can you help? Thanks!