Mnemonic peg systems are almost perfectly arbitrary so they provide a decent case study for how you form memories in the absence of any governing structure or natural chunking. It's an "IQ-proof" task.
I don't think it's useful to try to adopt mnemonic pegs without any chunking. I personally started having pegs from 0 to 9 and 00 to 99. I filled them with images of woman that I put into 11 categories with 10 people and sorted every pile by the alphabet.
After thinking about it I realized that the system I'm using doesn't have zero structure, but it has less than, say, multiplication tables.
I use the phonetic two digit Person-Action-Object system. So 23 for example corresponds to "Nemo nomming (a) gnome." (n=2 and m=3). 48 is "Raph raving (at a) ref." (r=4, f/v=8). 56 is "Luigi leashing a leach." (5=l, 6=sh/j/ch). This allows you to chunk 234856 as the vivid image "Nemo raving at a leach."
I'm still not quick enough with the system to say whether it's really useful. P...
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