Congrats! I'm more than a little envious. Trader may catch up someday... about a year after you stop!
> how many nails does a good rob reward you at that lvl?
I can answer that: sqrt(600)/2, round down = 12. And just because "I'm like that":
[pre]
Nails Level
1 1-15 (an apparent exception to the formula)
2 16-35
3 36-63
4 64-99
5 100-143
6 144-195
7 196-255
8 256-323
9 324-399
10 400-483
11 484-575
12 576-675
13 676-783
14 784-899
15 900-1023
16 1024-1155
17 1156-1295
18 1296-1443
19 1444-1599
20 1600-1763
21 1764-1935
22 1936-2115
23 2116-2303
24 2304-2499
25 2500-2703
... you get the picture
[/pre]
Sandy