NumberInitial
Weight
Pile
weight
Initial
Balance
Cut 
Weight
Sanded
Weight
Cut/shod
weight
Cut/shod
balance
Re-sanded 
Weight
Re-Sanded
Balance
Finished
weight
Finished
balance
1

37810239.7531231042628422
28
45429
2

3781024031031042228
422
28
44828.75
3378
102
39.7531231042228
422
28
45029

4

380
102
41
flip
31231042228
422
28
45429
5

3801004031231242228
422
28
45028.75
6

380
100
41
flip
31431242428
422
28
45229
7

380
100
41
flip
31231242628.25
422
28.25
45029
8

382
100
4031431242628.5
422
28
45429
9

382
100
40.531431242428
422
28
45029
10

382
100
39.531431242628.5
422
28.5
45229.25
11

382
100
41.5
flip
31631242628.5
422
28
45429.25
12

386
100
41
flip
31831242428
422
28
45229
Average
/Spread
380.6
8gr

40.41
1.75cm

310/312

Spread 4gr,
avg 424.17
Avg
28.145
Spread 0Avg
28.06
Spread 6gr
Average 451.67
Avg
29

Initial length 80cm, balance point 40cm ONO
Pip - "10 grains per lb draw weight" - so for we're looking to reach 470gr for completed arrow. 
Sand less for heavier piles!

Final length 70cm;  60% balance point = 28cm

Average balance point  ____cm = ____%

Final weight spread ____gr