Creating Stella, Celestial Armor

Celestial Armor (https://www.d20pfsrd.com/magic-items/magic-armor/specific-magic-armor/celestial-armor/) = 22,400 gp market price
Initial material cost (25%): 5,600 gp
{Artisan Features: -25% magic item creation time, -5% magic arms and armor cost}
Current final cost: 70% = 15,680 gp

Progress (1 challenge per 5,000 gp in item's market price):
0 gp - Prepare the Vessel - Critical Success ✓✓

5,000 gp (?) - Challenge 1 - (Historic Stumbling Block) Critical Success ✓✓ - An amazing workaround overcomes the issue. –3 days, –5% cost.

10,000 gp (?) - Challenge 2 - (Aberrant Mutation) Critical Success ✓✓ - Mutation proves helpful. 1 perk.

15,000 gp (?) - Challenge 3 - (Fragile Components) Success ✓ - Undamaged components. No adjustment.

20,000 gp (?) - Challenge 4 - (Sesquipedalian Elucidation) Success ✓ - Instructions elucidated. –1 day.

22,400 gp (?) - Complete the Item - Critical Success ✓✓ - You complete the item with a masterful flourish. Reduce the item’s cost by 10%.

Glimmer overcharge: (1/100; 1 perk)

Final cost: 55% = 12,320gp

PtV Critical Success:	starting cost: 75%, resting progress: 2,000 gp per day; adventuring progress: 500 gp per day ✓✓
PtV Success:			starting cost: 85%, resting progress: 1,000 gp per day; adventuring progress: 250 gp per day
PtV Failure:			starting cost: 100%, resting progress: 500 gp per day;	adventuring progress: 125 gp per day

Current Progress: 22,400/22,400
Glimmer Reroll Used? N