Seagate (STX) is one of my AIM machines, nice dividend and it can move a lot. Yesterday I read that STX bought 2-4% of Ripple in 2015.
Now I rather accumulate STX and not sell it using AIM.
The same feeling I have with BRK, just accumulate it and not sell it using AIM.
For accumulation twinvest or synchrovest are nice vehicles but they are calendar dependent. Now for accumulation I use iAIM with iSkip technology, where cash is not bought(shares not sold) but rather skipped indefinitely or until some condition triggers a transaction.
Of course parameters are updated to facilitate 'light' buying and increased accumulation.