Any grammar gurus around? (so vs. so that and an infinitive question)

[Hyacinth]

I'm proofreading a brochure and these pesky grammar issues have stumped me. 

 

Question #1:

Your Special DooDad has a 10-year limited warranty, so you can enjoy worry-free operation.

or

Your Special DooDad has a 10-year limited warranty so that you can enjoy worry-free operation.

 

Google tells me the difference has to do with whether the information relates to purpose or effect. That confused me further :(.

 

 

Question #2:

The Special DooDad control board can detect problems and help your servicing contractor to correct them quickly and efficiently.

or

The Special DooDad control board can detect problems and help your servicing contractor correct them quickly and efficiently.

 

The second one sounds better to my ear, but that's not the best test for correctness. I *think* there's something about using the infinitive after the verb "help." Am I making that up?

 

Thanks, Hive!

 

 

[HTRMom]

Question 1. Both correct. I would choose the second - the purpose for the warranty is your worry-free operation.

 

Question 2. The second option. Help is special and does not need the infinitive, although it's not incorrect to use it.

 

 

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