Welcome Kast and congratulations on giving AIM a try,
1) v-Wave: It's a variable indicator that relates to general market risk and the cash reserve of an AIM account for both starting purposes and also as a benchmark for where your own cash levels are with an ongoing AIM'ed investment. It's probably conservative for diversified mutual funds, less so for business sector funds and is about right for BETA 1.00 stocks. It might be a bit aggressive for IPOs and stocks with very high BETAs.
2) Split SAFE: Personally after a couple of decades of AIMing with Split SAFE I'd suggest that my article at aim-users.com be used as a reference and not gospel. During a raging bull market it may seem to be good to stage all the SAFE on the Sell side, but when the bear comes out of hibernation it complicates AIM's feedback loop to the Portfolio Control.
Today if I subtract something from the Total SAFE (buy plus sell) I take it from the Sell side only. If I want to keep SAFE at a full 20%, I normally stage all of it on the Buy side. The reason is that Cash is finite in AIM where Stock Value for selling is infinite. Almost NEVER do I let Buy SAFE drop below 10% because of feedback to Portfolio Control.
For diversified mutual funds, usually 10% Buy SAFE and zero Sell SAFE works well. However, I also use a 30 day delay between sequential buys, even on mutual funds. The more specific the fund (such as business sector funds, REITs or emerging markets) the more I add to the Buy SAFE. It's rare that I use over 20% total SAFE (Buy plus Sell). If I have an urge to use more SAFE than that, I usually then increase the value of my minimum trade instead (say 7.5% or 10% of Portfolio Control as a minimum order value).
The other reason I do this now is that I habitually use "vealies" to contain a portfolio's enthusiasm for building up too much cash. That acts as a surrogate for having a fat Sell SAFE.
3) Dividends and Distributions: You're right, in a retirement account it makes very little difference whether you take distributions in cash or shares. AIM is a very effective purchasing agent. So, it tends to be a little more efficient when buying shares than having the dividends reinvested (dollar cost averaging). This is a very subtle difference, however, and takes years to see. Also, since I use "vealies", Portfolio Control recognizes the distributions periodically during long bullish markets.
4) Frequency of Selling should be as often as AIM suggests there are profits to be taken. (assuming you aren't swimming in Cash compared to the v-Wave.) Generally I use "Good Until Cancelled, Limit Orders" for selling and size the orders as "minimum." That way, if the market comes to my price target, the trade almost always gets done whether I'm watching or not. I then recalculate the "next sell price" and enter a new GTC Limit order.
Frequency of Buying is a different story. As mentioned above, our cash reserves are finite, but our supply of equity is infinite in an AIM world (note: the LD-AIM variant can exhaust the equity side). To slow AIM's enthusiasm for spending down our reserves of cash, it's best to stage sequential buys 30 days apart. That allows us to continue buying during protracted Bear markets for a longer time. I've been using the "30 day rule" relatively uniformly for over a decade and feel it's been a major improvement considering the market turmoil we've seen in that time.
I hope this helps,
Tom