I would suggest you liase with the Manx Museum over their future plans - I know they intend to digitise the wills - obviously there are questions as to when and availability of images - I decided some time ago that my summaries provide a rapidly searchable handlist as I suspect once the will has been located most family historians would want to check on any transcription(eg I have done over 80% of wills in period 1750..1799 (near 50% in 1700..1749) with some parishes near complete which is what I need for my own research but provides a rapidly searchable database of key items included in the wills - often the 'full' transcriptions actually are not full in ignoring the inventory).