ILR due zimba, CR001, Marcnath plz guide me

[Jay87]

Dear All,

Sorry I am asking this question again by creating new topic as I could not get the answer there. Please don't lock this topic instead you can lock previous one.

I am on tier1 ext visa which is valid untill May 2020. 2 FT job requirements will be completed by end of this month. So I am going to apply ILR on 1st of july.
My questions are...
1.) In worst case if ILR refused still my visa will be valid untill May2020.
2.) My 10 yr will be completed in April 2020 so ILR refusal would effect on LR route?
3.) Am I taking right decision by applying Ilr next months or you recommend me something better?
4.) Can we send documents by post or just have to upload?

Thanks