CPE sentence transformation 4

Here's another exercise of mine. Could somebody have a look at it?
Many thanks!

Rules are as usual:
- the sentences in green must be completed so as to keep the same meaning as the ones in blue
- no less than 3 and no more than 8 words (including the word in bold) must be used
- my sentences are in black, and the words I've added in italics

1. Please read the instructions carefully before you use this appliance.
[making] Before ……………….. this appliance, please read the instructions carefully.
Before making use of this appliance, please read the instructions carefully.

2. When I had another look at the film script, I was impressed by its quality.
[through] On ……………….., I was impressed by its quality.
a. On reading through the film script, I was impressed by its quality.
b. On looking through the film script, I was impressed by its quality.
c. On going through the film script, I was impressed by its quality.
(My first choice would be "reading through", but I wrote also "going/looking through" because I cannot fully appreciate the difference between the three of them. Am I missing something?)

3. He started his journey early but still didn’t get there on time.
[off] Despite ……………….. late.
a. Despite setting off early, he arrived late.
b. Despite setting off early, he got there late.

4. They made him wait for three hours, then finally let him in.
[kept] He was finally admitted after having ……………….. for three hours.
He was finally admitted after having been kept waiting for three hours.
5. We were bowled over by the news as we hadn’t thought we would win an Oscar for the film.
[expected] Not ……………….. an Oscar for the film, we were completely bowled over by the news.
Not having expected (that) we would win an Oscar for the film, we were completely bowled over by the news.

6. This car will give you many years of service if you care for it properly.
[after] Properly ……………….., this car will give you years of service.
Properly looked after, this car will give you years of service.
(wait! this one can’t be right!!! I need to use at least 3 words …)