Hi Mike,
I have a 325 and feel your set up is very much on the light side! I have a 15Kg Bruce, with 45m/8mm chain and 45m of rope braid spliced on.
In Europe, two main areas have different needs (i.e Tidal / Non tidal):
Med (Non-Tidal) I found one is often anchored out in very high winds, sometimes gusts of 30kts+ and rarely in winds above this! For this you do need a lot of chain. I made a rule that I would try not to drop anchor in greater depths than 10m. (My rule, as beyond this depth, a recovery of a trapped anchor becomes really difficult!). Even then, assuming a sandy bottom (i.e. good holding) sometimes, I felt needed more chain in higher winds to feel safe. However, rarely did I ever have to run out some extra braid too. Actually 45m of chain did the job!
Northern Europe (Tidal and North France / Channel Islands) one needs a lot of chain to cope with the potential 10m tidal rises and also in sometimes very strong currents. Here, I've often found myself running all the chain out and sometimes quite a lot of braid too! I think the recommended figure is 5 to 1 chain to boat length - that's a lot of chain! But to be honest, I feel 5 to 1 is pretty bomb proof in lighter weather and is actually often difficult to achieve when in a tight bay or crowded anchorage. Everything is a compromise.
When I fitted my windlass, I was thinking about length of my 8mm chain in terms of weight? I was concerned about having too much bow weight forward and in a choppy sea. How much weight could a 325 take, I wondered? I had to make a guess, as you will! Hence, my mix of braid and chain above. Braid does not weigh much, it's the windlass, anchor and chain. However, in hindsight, I think I would have reduced the length of my braid slightly and and added maybe another 5m of chain, i.e. take it up to 50m from my current 45m (i.e. to 5 to 1 ratio). (My view!).
There is no right answer to this Mike and your best guess is as good as mine, but I would also advise you to think about what kind of sailing you are likely to be doing? Are you unlikely to be anchoring in relatively exposed places in high tides or high winds or will you be mostly harbour bound? If so, trim it back a bit! But 36m is too light!
I found Jimmy Green to be very helpful in getting this right. Speak with them.
Hope this is a help?
Best Regards,
Stuart
Pegasus 325/37