Business & farm

1. If I e-filed already what's the point of sending a printed copy of completed form 8949 together with 8453? Is that really necessary?
2. I thought just “IRC SECTION 751 STATEMENT” that came together with K-1 schedule from partnership and maybe also sending "Sales Worksheet" together with that would be enough. The things that you say should be part of the letter is all included in K-1 package. Why not simply include K-1 as attachment but it was already mentioned not to send that to IRS on K-1 so the first part of your answer seems to be inconsistent.  
3. For cases such as mine where I traded 3 PTPs each at most $1000 worth this sounds like an overkill. Is there a rule that relaxes mailing of irc 751 statement if the traded amount or taxed amount is below certain amount?
4. Isn't there a way to submit the statement through e-file, if SSN and good chunk of my tax info will go in mail, what's the point of e-filing other than receiving return a little sooner?