Hi Alan,you shure have had some bad experiences with reels recently. Re. the Penn 112H,the man to speak to is,Mick Simmons of Penn Servicing Ph 01386 552949. He services Penns for both the UK and Europe,also stocks all the spares a really helpful gent.I have two 112H models,one over 45years of excellent service having had a few parts replaced over the years.Both made in the USA and fitted with one piece chromed bronze spools which may still be obtainable from Mick Simmons.These spools were vastly superior to the black anodised aluminium spools currently fitted to the majority of Penn multipliers. The Penn 975 and similar gold anodised reels are "high maintenance" eye candy as time will tell.
Hold on to your Mitchell 624,not one ferrous part fitted,what a reel!Hope you get the 112H sorted as it very fine boat reel with an excellent rate of line recovery.