I have 14v (a) Precise Flight cable operated speed brakes; (b) hydraulic pack; and (c) heated pitot tube all installed and working in my LIV project. However I have acquired a TSIO 550B with a  (dual alternator) 28v system. I would like to go with the 28v system but I hate to go backwards (not to mention the expense) to retrofit my 14v equipment.  I am wondering if it is possible/advisable to run a 28v system but utilize my 14v equipment by installing individual transformers for some or all of (a), (b) or (c) above? Thanks for any advice any of you may have.