After spending most of the day playing with the captcha destruction kit (which is awesome! I've got quite few solved by myself!) I have a suggestion.
You able to set it to 'lower case' 'upper case' 'alpha' etc. etc. But some captchas only have 4 numbers or 4 letters or both. But there is nowhere to tell the destruction kit the amount of numbers it has. E.g. sometimes it decodes the letter H as either 11 or II. If you could tell it that it only needs 4 digits, would it reduce this problem and increase success rate?
So, for example. 412H might come up as 41211 or 412II, if you could tell it how many digits or letters to look for would this be of any help? so instead of thing H is 2 letters/digits it will only see it as 1 and give it more chance to decode it?