If I can find a single point in the stake-calculating code which can be used to filter out watch-only addresses from the rest (any address without a privkey is a watch-only address) and I can persuade the wallet to filter out the watch-only txs from the overview and I can create a duplicate of the tx listing that is specialised to watch-only addresses then we could be in business.
Hi Graham, thank you so much for give a look at this.
I understand the difficult as you have so well explained the matter.
I think another workaround to getting that is working at "wallet level" not at "address level".
Maybe, if would be possible to get two wallets runing in the same slimcoin-qt window, differents tabs, one with all functionalities and another one (watch-only wallet for watch-only addresses) with PoS, PoB and PoW and any other functionality disabled. At the moment to put private address of watch-only address it would be moved from watch-only wallet to "active" wallet.
I don't know if that solution is really easiest or not and if could be exist possible security problems.
Cheers.