I'd be inclined to also just AIM the share price and keep/accumulate dividends outside. If you add dividends to the AIM account broadly over longer periods of time AIM will tend to accumulate too much cash reserves. You might start an AIM with 60-40 stock/cash settings for instance and end up with 30-70 stock/cash amounts.
Tom addresses that cash accumulation tendency by pulling Vealies (pretending to have sold some stock when AIM indicates, but not actually doing so).
Generally if during accumulation years you combine both dividends being received together with new additions (savings), maybe starting with one AIM and expanding the number of AIM's over time, your individual AIM's will tend to stay more centralised.