1 week and 1,000 gold pieces

“1 week and 1,000 gold pieces” is a phrase any player of an ACKS arcane spellcaster is familiar with. Similarly to my ACKS Consolidated Spell Progression, I thought it might be helpful to consolidate common related arcane (and divine) spellcaster tasks into one table.

Spellcaster task	1 week	1 week and 2,000gp	1 week per spell level and 500gp per spell level	1 week per spell level and 1,000gp per spell level	2 weeks per spell level and 1,000gp per spell level
Write spell into spellbook	x
Add spell to repertoire	x
Lose spell level from repertoire	x
Replace spell in repertoire				x
Rewrite lost spell into spellbook				x
Research new spell					x
Learn ritual spell					x
Cast ritual spell			x
Identify magic item		x

Of the above tasks, only the last four require a Magic Research throw for success. What if all of these tasks benefited from a Magic Research throw in some way? For example, a mage might make a successful Magic Research throw to prevent loss of one spell level from his repertoire for one week, as he desperately attempts to recover his spellbook. An 11^th level mage might quickly note a newly acquired 1^st level spell in his spellbook in a day, rather than a week. In this and similar cases, a Magic Research throw would indicate a degree of success that might reduce the time and gold required to accomplish a task.

I suspect some easily adapted d20 degree of success mechanics are out there. What do you recommend?