So I have been reading over the Artificer Dilettante feat and enhancements and I have to ask: what do they do? The ddowiki is not very forthcoming with details. I will give some examples.

Quote Originally Posted by Artificer Dilettante feat
You have watched the artificers of House Cannith work their trade. You gain proficiency with all crossbows, and Artificer Knowledge: Scrolls (You gain a +2 bonus to Use Magical Device checks when using scrolls, and their Caster Level is increased by one - this Caster Level increase is capped by your Intelligence modifier.) You are able to use wands and scrolls as if you are a level one artificers. For item use purposes you count as a level one artificer in addition to any other classes you possess (though this does not grant the ability to use Rune Arms).
1)Proficiency with all crossbows: does that mean repeaters as well?

2) Caster level with scrolls is increased by one by it is capped by Intelligence modifier. Does this mean that a scroll is limited to a maximum of +1 caster level? If I have an Intelligence of 14, it will still only be +1?
Quote Originally Posted by Improved Artificer Dilettante I
Your knowledge of magical items has improved, and now extends to potions. Also increases your caster level in your dilettante class by 1, so you are now treated as a second level Artificer instead of first level for scrolls and purposes.
1)What does it mean that "knowledge of magical items has improved?" Does that mean the level bonus for using scrolls and potions is now increased to +2 (assuming Intelligence is at least 14)?

2) What does the "and purposes" refer to in the phrase "for scrolls and purposes" mean? What other purposes? Are there artificer restricted items or something?
Quote Originally Posted by Improved Artificer Dilettante II
Your knowledge of magical items has improved, and now extends to wands. Also increases your caster level in your dilettante class by 1, so you are now treated as a third level Artificer instead of first level for scrolls and purposes.
Same question as before basically. Does this mean the level for using scrolls, potions and wands is now increased by +3 (assuming Intelligence of at least 16)?
Quote Originally Posted by Improved Artificer Dilettante III
Your knowledge of magical items has improved, and now extends to magical arms and armor. Also increases your caster level in your dilettante class by 1, so you are now treated as a fourth level Artificer instead of first level for scrolls and purposes.
1) This is a confusing one. What does it mean to have the knowledge of magical arms and armor improved? Does this only apply to magical arms and armor that have spell clickies? For example, if I have armor with a haste clickie with caster level 5, does this increase the caster level of the clickie?

2) Again, does this increase the caster level bonus for scrolls, potions, wands, and magical arms and armor by +4 (assuming a minimum Intelligence of 18)?

That's about it. Thanks for the help, fellow half-elf players!