Is it permissible to publish montages of Quranic recitations, compiling different recitations with the intention of ongoing charity (sadaqah jariyah), and would I bear the sin of Tajweed errors made by the reciters whose recitations I publish? And if that is the case, must I delete what I have previously published?

If the clips are of reciters known for their mastery of recitation, then there is no objection to publishing them. If they are of others who are not known for their mastery of recitation, then the recitations must be presented to a knowledgeable and skilled reciter (shaykh), and their advice should be followed. A condition for publishing audio clips of the Qur’an is that the recitation must be correct.