Using contract expert to delete clauses

has anyone done this

Our user has a requirement to add and delete multiple clauses based on the template

Example

is this a service model contract Yes/No

If yes add clause 1,2,3 in section 1,2,3

delete clause 2,4,6 from section 1.,2,3

Also any idea how to sub number clauses

Example

Clause 1

***body of clause***

1.1 term: the contract term is 5 years

1.2 the term may be 4 years if both parties agree

The problem is how to auto number these type of clauses as the renumber function will not work

Thanks