Best hands-on financial modelling course for IB internship prep?

Hi everyone, have a summer internship coming up in IB and want to ensure that I convert. I'm aware it'll come with training but the bar will be high and there'll be a focus on quality /accuracy of work and efficiency/speed vs the other interns. I've gone through BIWS 400qs and similar guides so the theoretical stuff I'm mostly ok on, just looking for a comprehensive course I can go through during the next couple of months to get very efficient at real life Excel use.

Would love to hear any opinions/experiences/comparisons about BIWS/breaking into wall street, WSP/wall street prep, WSO/wall street oasis, TTS/training the street, FE/financial edge, as these are the ones I'm considering (so far ruled out CFI/FMVA and don't care about certifications).

From what I've seen online so far, looks like TTS is a bit outdated, FE would be duplicative in some way, WSO is less comprehensive, BIWS is less beginner-friendly and videos are too long, WSP has some errors but seems to be the best overall? If anyone can comment on this