Re: Give Russia's reputation for poor workmanship
The linked Russian media article says the repair was done with medical gauze & sealant .....
Then again, it also has a classic, paraphrasing : "we've asked the Americans for these records, but they're personal /private medical records, so we probably won't get them, but if we don't get them we'll know the Americans are hiding things from us and then there will be no need for us to ask any more questions (about whether the Americans did this)."