I wrote the attached script to train bowcraft/fletching.  This script will train you from 0 skill to 100.  I reviewed the skill training cycle on UOGuide and found it to be flawed.  I deviated from that progression by making bows as soon as possible, and making fukiya darts for longer, from 50 to 60.  I hate to pass up an opportunity to train making something that uses one resource and you still gain well making darts up to 60.  The script rides a lot of the failure curve.  If you want to speed up skill gain at the cost of some resources, use a + fletching bonus talisman.  
Requirements:   Must have enough tinker skill to make Fletcher's Tools, because real crafters make their own tools. 
Like all of my other craft scripts, this is a beta release, so please post any feedback, bugs, etc. 
;=====================================================================
; Script Name:   Bowcraft Skill Trainer from 0 to 120
; Author: Paulonius
; Version: 0.10
; Client Tested with:
; EUO version tested with:
; Shard OSI / FS: OSI
; Initial Release Date:  05/03/2011
; Revision Date: TBD
; Global Variables Used: N/A
; Purpose: Train BC/F
;======================================================================
; TO Do List
; 1. build a skill tracking menu
;
;======================================================================
; Instructions:
; 1. Position yourself with reach of a secured trash barrel
; 2. Be within reach of a secure w/ standard ingots & boards on top level
; 3. Have a tinker kit in your backpack
; 4. Hit Play
UOGUIDE Training Progression
29.0 - 34.9: Shafts 
35.0 - 49.9: Bows 
50.0 - 55.9: Fukiya Darts 
60.0 - 69.9: Crossbows 
70.0 - 79.9: Composite Bows 
80.0 - 89.9: Heavy Crossbows 
90.0 - 100.0: Repeating Crossbows 
Paulonius' Training Progression
0.00 - 29.9: Shafts 
30.0 - 49.9: Bows 
50.0 - 59.9: Fukiya Darts 
60.0 - 69.9: Crossbows 
70.0 - 79.9: Composite Bows 
80.0 - 89.9: Heavy Crossbows 
90.0 - 100.0: Repeating Crossbows 
Consumption Results:
Approximately 9000 boards from 0 skill to 70 skill
70 skill to gm under ROT should require under 3000 boards for a total of under 12000
Testing to GM from 70 under standard skill increase rule set to be determined when I complete ROT testing.