Hi there DAnn, welcome here to the forum
Good luck with your Visit Visa
Not sure what additional advice you are looking for, especially as you are quite far advanced in your application.
I'm sure you already understand that these visit visa's can often be problematic for many reasons.
Not least because approval or refusal of General Visitor (tourist) visa applications is principally based on the discretion of the ECO.
The major issue often comes down to the need by the applicant to prove a non-immigrant intent.
That is, clearly demonstrating that they do not intend to remain in the UK beyond the visa expiry date.
The ECO must be satisfied that the applicant has strong social, economic and family ties back home that on the basis of probability would compel them to leave the UK at the end of the temporary stay.
It can sometime be difficult to overcome this presumption.
The UKBA page specifically for UK Visit Visa's can be found here .
It's well worth taking a look and checking out all of the links provided.
There's quite a good bit of helpful information within this forum and I'm sure a quick search will be worthwhile.